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/* |
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** Copyright (c) 2006 D. Richard Hipp |
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** |
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** This program is free software; you can redistribute it and/or |
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** modify it under the terms of the Simplified BSD License (also |
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** known as the "2-Clause License" or "FreeBSD License".) |
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** This program is distributed in the hope that it will be useful, |
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** but without any warranty; without even the implied warranty of |
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** merchantability or fitness for a particular purpose. |
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** |
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** Author contact information: |
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** [email protected] |
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** http://www.hwaci.com/drh/ |
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** |
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******************************************************************************* |
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** |
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** This file contains code for miscellaneous utility routines. |
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*/ |
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#include "config.h" |
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#include "util.h" |
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#if defined(USE_MMAN_H) |
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# include <sys/mman.h> |
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# include <unistd.h> |
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#endif |
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#include <math.h> |
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/* |
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** For the fossil_timer_xxx() family of functions... |
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*/ |
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#ifdef _WIN32 |
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# include <windows.h> |
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# include <io.h> |
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#else |
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# include <sys/time.h> |
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# include <sys/resource.h> |
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# include <sys/types.h> |
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# include <sys/stat.h> |
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# include <unistd.h> |
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# include <fcntl.h> |
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# include <errno.h> |
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#endif |
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/* |
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** Returns the same as the platform's isatty() or _isatty() function. |
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*/ |
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int fossil_isatty(int fd){ |
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#ifdef _WIN32 |
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return _isatty(fd); |
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#else |
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return isatty(fd); |
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#endif |
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} |
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/* |
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** Returns the same as the platform's fileno() or _fileno() function. |
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*/ |
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int fossil_fileno(FILE *p){ |
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#ifdef _WIN32 |
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return _fileno(p); |
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#else |
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return fileno(p); |
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#endif |
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} |
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/* |
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** Exit. Take care to close the database first. |
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*/ |
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NORETURN void fossil_exit(int rc){ |
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db_close(1); |
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#ifndef _WIN32 |
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if( g.fAnyTrace ){ |
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fprintf(stderr, "/***** Subprocess %d exit(%d) *****/\n", getpid(), rc); |
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fflush(stderr); |
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} |
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#endif |
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exit(rc); |
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} |
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/* |
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** Malloc and free routines that cannot fail |
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*/ |
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void *fossil_malloc(size_t n){ |
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void *p = malloc(n==0 ? 1 : n); |
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if( p==0 ) fossil_fatal("out of memory"); |
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return p; |
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} |
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void *fossil_malloc_zero(size_t n){ |
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void *p = malloc(n==0 ? 1 : n); |
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if( p==0 ) fossil_fatal("out of memory"); |
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memset(p, 0, n); |
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return p; |
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} |
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void fossil_free(void *p){ |
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free(p); |
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} |
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void *fossil_realloc(void *p, size_t n){ |
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p = realloc(p, n); |
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if( p==0 ) fossil_fatal("out of memory"); |
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return p; |
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} |
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void fossil_secure_zero(void *p, size_t n){ |
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volatile unsigned char *vp = (volatile unsigned char *)p; |
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size_t i; |
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if( p==0 ) return; |
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assert( n>0 ); |
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if( n==0 ) return; |
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for(i=0; i<n; i++){ vp[i] ^= 0xFF; } |
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for(i=0; i<n; i++){ vp[i] ^= vp[i]; } |
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} |
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void fossil_get_page_size(size_t *piPageSize){ |
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#if defined(_WIN32) |
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SYSTEM_INFO sysInfo; |
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memset(&sysInfo, 0, sizeof(SYSTEM_INFO)); |
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GetSystemInfo(&sysInfo); |
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*piPageSize = (size_t)sysInfo.dwPageSize; |
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#elif defined(USE_MMAN_H) |
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*piPageSize = (size_t)sysconf(_SC_PAGE_SIZE); |
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#else |
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*piPageSize = 4096; /* FIXME: What for POSIX? */ |
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#endif |
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} |
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void *fossil_secure_alloc_page(size_t *pN){ |
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void *p; |
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size_t pageSize = 0; |
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fossil_get_page_size(&pageSize); |
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assert( pageSize>0 ); |
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assert( pageSize%2==0 ); |
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#if defined(_WIN32) |
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p = VirtualAlloc(NULL, pageSize, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE); |
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if( p==NULL ){ |
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fossil_fatal("VirtualAlloc failed: %lu\n", GetLastError()); |
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} |
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if( !VirtualLock(p, pageSize) ){ |
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fossil_fatal("VirtualLock failed: %lu\n", GetLastError()); |
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} |
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#elif defined(USE_MMAN_H) |
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p = mmap(0, pageSize, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
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if( p==MAP_FAILED ){ |
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fossil_fatal("mmap failed: %d\n", errno); |
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} |
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if( mlock(p, pageSize) ){ |
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fossil_fatal("mlock failed: %d\n", errno); |
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} |
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#else |
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p = fossil_malloc(pageSize); |
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#endif |
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fossil_secure_zero(p, pageSize); |
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if( pN ) *pN = pageSize; |
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return p; |
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} |
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void fossil_secure_free_page(void *p, size_t n){ |
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if( !p ) return; |
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assert( n>0 ); |
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fossil_secure_zero(p, n); |
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#if defined(_WIN32) |
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if( !VirtualUnlock(p, n) ){ |
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fossil_panic("VirtualUnlock failed: %lu\n", GetLastError()); |
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} |
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if( !VirtualFree(p, 0, MEM_RELEASE) ){ |
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fossil_panic("VirtualFree failed: %lu\n", GetLastError()); |
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} |
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#elif defined(USE_MMAN_H) |
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if( munlock(p, n) ){ |
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fossil_panic("munlock failed: %d\n", errno); |
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} |
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if( munmap(p, n) ){ |
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fossil_panic("munmap failed: %d\n", errno); |
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} |
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#else |
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fossil_free(p); |
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#endif |
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} |
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/* |
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** Duplicate a string. |
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*/ |
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char *fossil_strndup(const char *zOrig, ssize_t len){ |
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char *z = 0; |
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if( zOrig ){ |
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if( len<0 ) len = strlen(zOrig); |
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z = fossil_malloc( len+1 ); |
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memcpy(z, zOrig, len); |
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z[len] = 0; |
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} |
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return z; |
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} |
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char *fossil_strdup(const char *zOrig){ |
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return fossil_strndup(zOrig, -1); |
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} |
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char *fossil_strdup_nn(const char *zOrig){ |
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if( zOrig==0 ) return fossil_strndup("", 0); |
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return fossil_strndup(zOrig, -1); |
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} |
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/* |
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** strcpy() workalike to squelch an unwarranted warning from OpenBSD. |
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*/ |
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void fossil_strcpy(char *dest, const char *src){ |
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while( (*(dest++) = *(src++))!=0 ){} |
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} |
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/* |
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** Translate every upper-case character in the input string into |
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** its equivalent lower-case. |
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*/ |
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char *fossil_strtolwr(char *zIn){ |
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char *zStart = zIn; |
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if( zIn ){ |
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while( *zIn ){ |
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*zIn = fossil_tolower(*zIn); |
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zIn++; |
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} |
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} |
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return zStart; |
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} |
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/* |
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** This local variable determines the behavior of |
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** fossil_assert_safe_command_string(): |
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** |
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** 0 (default) fossil_panic() on an unsafe command string |
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** |
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** 1 Print an error but continue process. Used for |
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** testing of fossil_assert_safe_command_string(). |
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** |
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** 2 No-op. Used to allow any arbitrary command string |
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** through fossil_system(), such as when invoking |
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** COMMAND in "fossil bisect run COMMAND". |
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*/ |
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static int safeCmdStrTest = 0; |
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/* |
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** Check the input string to ensure that it is safe to pass into system(). |
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** A string is unsafe for system() on unix if it contains any of the following: |
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** |
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** * Any occurrence of '$' or '`' except single-quoted or after \ |
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** * Any of the following characters, unquoted: ;|& or \n except |
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** these characters are allowed as the very last character in the |
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242
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** string. |
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** * Unbalanced single or double quotes |
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** |
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245
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** This routine is intended as a second line of defense against attack. |
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** It should never fail. Dangerous shell strings should be detected and |
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** fixed before calling fossil_system(). This routine serves only as a |
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** safety net in case of bugs elsewhere in the system. |
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** |
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250
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** If an unsafe string is seen, either abort (default) or print |
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** a warning message (if safeCmdStrTest is true). |
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*/ |
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253
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static void fossil_assert_safe_command_string(const char *z){ |
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254
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int unsafe = 0; |
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#ifndef _WIN32 |
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256
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/* Unix */ |
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257
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int inQuote = 0; |
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258
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int i, c; |
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259
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for(i=0; !unsafe && (c = z[i])!=0; i++){ |
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260
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switch( c ){ |
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261
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case '$': |
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262
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case '`': { |
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263
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if( inQuote!='\'' ) unsafe = i+1; |
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264
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break; |
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265
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} |
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266
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case ';': |
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267
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case '|': |
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case '&': |
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case '\n': { |
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if( inQuote!='\'' && z[i+1]!=0 ) unsafe = i+1; |
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break; |
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272
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} |
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273
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case '"': |
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274
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case '\'': { |
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275
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if( inQuote==0 ){ |
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276
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inQuote = c; |
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277
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}else if( inQuote==c ){ |
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278
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inQuote = 0; |
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279
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} |
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280
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break; |
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281
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} |
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282
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case '\\': { |
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283
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if( z[i+1]==0 ){ |
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284
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unsafe = i+1; |
|
285
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}else if( inQuote!='\'' ){ |
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286
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i++; |
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287
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} |
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288
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break; |
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289
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} |
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290
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} |
|
291
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} |
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292
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if( inQuote ) unsafe = i; |
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293
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#else |
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294
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/* Windows */ |
|
295
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int i, c; |
|
296
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int inQuote = 0; |
|
297
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for(i=0; !unsafe && (c = z[i])!=0; i++){ |
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298
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switch( c ){ |
|
299
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case '>': |
|
300
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case '<': |
|
301
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case '|': |
|
302
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case '&': |
|
303
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case '\n': { |
|
304
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if( inQuote==0 && z[i+1]!=0 ) unsafe = i+1; |
|
305
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break; |
|
306
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} |
|
307
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case '"': { |
|
308
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if( inQuote==c ){ |
|
309
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inQuote = 0; |
|
310
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}else{ |
|
311
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inQuote = c; |
|
312
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} |
|
313
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break; |
|
314
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} |
|
315
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case '^': { |
|
316
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if( !inQuote && z[i+1]!=0 ){ |
|
317
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i++; |
|
318
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} |
|
319
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break; |
|
320
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} |
|
321
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} |
|
322
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} |
|
323
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if( inQuote ) unsafe = i; |
|
324
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#endif |
|
325
|
if( unsafe && safeCmdStrTest<2 ){ |
|
326
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char *zMsg = mprintf("Unsafe command string: %s\n%*shere ----^", |
|
327
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z, unsafe+13, ""); |
|
328
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if( safeCmdStrTest ){ |
|
329
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fossil_print("%z\n", zMsg); |
|
330
|
fossil_free(zMsg); |
|
331
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}else{ |
|
332
|
fossil_panic("%s", zMsg); |
|
333
|
} |
|
334
|
} |
|
335
|
} |
|
336
|
|
|
337
|
/* |
|
338
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** This function implements a cross-platform "system()" interface. |
|
339
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*/ |
|
340
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int fossil_system(const char *zOrigCmd){ |
|
341
|
int rc; |
|
342
|
#if defined(_WIN32) |
|
343
|
/* On windows, we have to put double-quotes around the entire command. |
|
344
|
** Who knows why - this is just the way windows works. |
|
345
|
*/ |
|
346
|
char *zNewCmd = mprintf("\"%s\"", zOrigCmd); |
|
347
|
wchar_t *zUnicode = fossil_utf8_to_unicode(zNewCmd); |
|
348
|
if( g.fSystemTrace ) { |
|
349
|
fossil_trace("SYSTEM: %s\n", zNewCmd); |
|
350
|
} |
|
351
|
fossil_assert_safe_command_string(zOrigCmd); |
|
352
|
rc = _wsystem(zUnicode); |
|
353
|
fossil_unicode_free(zUnicode); |
|
354
|
free(zNewCmd); |
|
355
|
#else |
|
356
|
/* On unix, evaluate the command directly. |
|
357
|
*/ |
|
358
|
if( g.fSystemTrace ) fprintf(stderr, "SYSTEM: %s\n", zOrigCmd); |
|
359
|
fossil_assert_safe_command_string(zOrigCmd); |
|
360
|
|
|
361
|
/* Unix systems should never shell-out while processing an HTTP request, |
|
362
|
** either via CGI, SCGI, or direct HTTP. The following assert verifies |
|
363
|
** this. And the following assert proves that Fossil is not vulnerable |
|
364
|
** to the ShellShock or BashDoor bug. |
|
365
|
*/ |
|
366
|
assert( g.cgiOutput==0 ); |
|
367
|
|
|
368
|
/* The regular system() call works to get a shell on unix */ |
|
369
|
fossil_limit_memory(0); |
|
370
|
rc = system(zOrigCmd); |
|
371
|
fossil_limit_memory(1); |
|
372
|
#endif |
|
373
|
return rc; |
|
374
|
} |
|
375
|
|
|
376
|
/* |
|
377
|
** Like "fossil_system()" but does not check the command-string for |
|
378
|
** potential security problems. |
|
379
|
*/ |
|
380
|
int fossil_unsafe_system(const char *zOrigCmd){ |
|
381
|
int rc; |
|
382
|
safeCmdStrTest = 2; |
|
383
|
rc = fossil_system(zOrigCmd); |
|
384
|
safeCmdStrTest = 0; |
|
385
|
return rc; |
|
386
|
} |
|
387
|
|
|
388
|
/* |
|
389
|
** COMMAND: test-fossil-system |
|
390
|
** |
|
391
|
** Read lines of input and send them to fossil_system() for evaluation. |
|
392
|
** Use this command to verify that fossil_system() will not run "unsafe" |
|
393
|
** commands. |
|
394
|
*/ |
|
395
|
void test_fossil_system_cmd(void){ |
|
396
|
char zLine[10000]; |
|
397
|
safeCmdStrTest = 1; |
|
398
|
while(1){ |
|
399
|
size_t n; |
|
400
|
int rc; |
|
401
|
printf("system-test> "); |
|
402
|
fflush(stdout); |
|
403
|
if( !fgets(zLine, sizeof(zLine), stdin) ) break; |
|
404
|
n = strlen(zLine); |
|
405
|
while( n>0 && fossil_isspace(zLine[n-1]) ) n--; |
|
406
|
zLine[n] = 0; |
|
407
|
printf("cmd: [%s]\n", zLine); |
|
408
|
fflush(stdout); |
|
409
|
rc = fossil_system(zLine); |
|
410
|
printf("result: %d\n", rc); |
|
411
|
} |
|
412
|
} |
|
413
|
|
|
414
|
/* |
|
415
|
** Like strcmp() except that it accepts NULL pointers. NULL sorts before |
|
416
|
** all non-NULL string pointers. Also, this strcmp() is a binary comparison |
|
417
|
** that does not consider locale. |
|
418
|
*/ |
|
419
|
int fossil_strcmp(const char *zA, const char *zB){ |
|
420
|
if( zA==0 ){ |
|
421
|
if( zB==0 ) return 0; |
|
422
|
return -1; |
|
423
|
}else if( zB==0 ){ |
|
424
|
return +1; |
|
425
|
}else{ |
|
426
|
return strcmp(zA,zB); |
|
427
|
} |
|
428
|
} |
|
429
|
int fossil_strncmp(const char *zA, const char *zB, int nByte){ |
|
430
|
if( zA==0 ){ |
|
431
|
if( zB==0 ) return 0; |
|
432
|
return -1; |
|
433
|
}else if( zB==0 ){ |
|
434
|
return +1; |
|
435
|
}else if( nByte>0 ){ |
|
436
|
int a, b; |
|
437
|
do{ |
|
438
|
a = *zA++; |
|
439
|
b = *zB++; |
|
440
|
}while( a==b && a!=0 && (--nByte)>0 ); |
|
441
|
return ((unsigned char)a) - (unsigned char)b; |
|
442
|
}else{ |
|
443
|
return 0; |
|
444
|
} |
|
445
|
} |
|
446
|
|
|
447
|
/* |
|
448
|
** Case insensitive string comparison. |
|
449
|
*/ |
|
450
|
int fossil_strnicmp(const char *zA, const char *zB, int nByte){ |
|
451
|
if( zA==0 ){ |
|
452
|
if( zB==0 ) return 0; |
|
453
|
return -1; |
|
454
|
}else if( zB==0 ){ |
|
455
|
return +1; |
|
456
|
} |
|
457
|
if( nByte<0 ) nByte = strlen(zB); |
|
458
|
return sqlite3_strnicmp(zA, zB, nByte); |
|
459
|
} |
|
460
|
int fossil_stricmp(const char *zA, const char *zB){ |
|
461
|
int nByte; |
|
462
|
int rc; |
|
463
|
if( zA==0 ){ |
|
464
|
if( zB==0 ) return 0; |
|
465
|
return -1; |
|
466
|
}else if( zB==0 ){ |
|
467
|
return +1; |
|
468
|
} |
|
469
|
nByte = strlen(zB); |
|
470
|
rc = sqlite3_strnicmp(zA, zB, nByte); |
|
471
|
if( rc==0 && zA[nByte] ) rc = 1; |
|
472
|
return rc; |
|
473
|
} |
|
474
|
|
|
475
|
/* |
|
476
|
** Get user and kernel times in microseconds. |
|
477
|
*/ |
|
478
|
void fossil_cpu_times(sqlite3_uint64 *piUser, sqlite3_uint64 *piKernel){ |
|
479
|
#ifdef _WIN32 |
|
480
|
FILETIME not_used; |
|
481
|
FILETIME kernel_time; |
|
482
|
FILETIME user_time; |
|
483
|
GetProcessTimes(GetCurrentProcess(), ¬_used, ¬_used, |
|
484
|
&kernel_time, &user_time); |
|
485
|
if( piUser ){ |
|
486
|
*piUser = ((((sqlite3_uint64)user_time.dwHighDateTime)<<32) + |
|
487
|
(sqlite3_uint64)user_time.dwLowDateTime + 5)/10; |
|
488
|
} |
|
489
|
if( piKernel ){ |
|
490
|
*piKernel = ((((sqlite3_uint64)kernel_time.dwHighDateTime)<<32) + |
|
491
|
(sqlite3_uint64)kernel_time.dwLowDateTime + 5)/10; |
|
492
|
} |
|
493
|
#else |
|
494
|
struct rusage s; |
|
495
|
getrusage(RUSAGE_SELF, &s); |
|
496
|
if( piUser ){ |
|
497
|
*piUser = ((sqlite3_uint64)s.ru_utime.tv_sec)*1000000 + s.ru_utime.tv_usec; |
|
498
|
} |
|
499
|
if( piKernel ){ |
|
500
|
*piKernel = |
|
501
|
((sqlite3_uint64)s.ru_stime.tv_sec)*1000000 + s.ru_stime.tv_usec; |
|
502
|
} |
|
503
|
#endif |
|
504
|
} |
|
505
|
|
|
506
|
/* |
|
507
|
** Return the resident set size for this process |
|
508
|
*/ |
|
509
|
sqlite3_uint64 fossil_rss(void){ |
|
510
|
#ifdef _WIN32 |
|
511
|
return 0; |
|
512
|
#else |
|
513
|
struct rusage s; |
|
514
|
getrusage(RUSAGE_SELF, &s); |
|
515
|
return s.ru_maxrss*1024; |
|
516
|
#endif |
|
517
|
} |
|
518
|
|
|
519
|
|
|
520
|
/* |
|
521
|
** Internal helper type for fossil_timer_xxx(). |
|
522
|
*/ |
|
523
|
enum FossilTimerEnum { |
|
524
|
FOSSIL_TIMER_COUNT = 10 /* Number of timers we can track. */ |
|
525
|
}; |
|
526
|
static struct FossilTimer { |
|
527
|
sqlite3_uint64 u; /* "User" CPU times */ |
|
528
|
sqlite3_uint64 s; /* "System" CPU times */ |
|
529
|
int id; /* positive if allocated, else 0. */ |
|
530
|
} fossilTimerList[FOSSIL_TIMER_COUNT] = {{0,0,0}}; |
|
531
|
|
|
532
|
/* |
|
533
|
** Stores the current CPU times into the shared timer list |
|
534
|
** and returns that timer's internal ID. Pass that ID to |
|
535
|
** fossil_timer_fetch() to get the elapsed time for that |
|
536
|
** timer. |
|
537
|
** |
|
538
|
** The system has a fixed number of timers, and they can be |
|
539
|
** "deallocated" by passing this function's return value to |
|
540
|
** fossil_timer_stop() Adjust FOSSIL_TIMER_COUNT to set the number of |
|
541
|
** available timers. |
|
542
|
** |
|
543
|
** Returns 0 on error (no more timers available), with 1+ being valid |
|
544
|
** timer IDs. |
|
545
|
*/ |
|
546
|
int fossil_timer_start(){ |
|
547
|
int i; |
|
548
|
for( i = 0; i < FOSSIL_TIMER_COUNT; ++i ){ |
|
549
|
struct FossilTimer * ft = &fossilTimerList[i]; |
|
550
|
if(ft->id) continue; |
|
551
|
ft->id = i+1; |
|
552
|
fossil_cpu_times( &ft->u, &ft->s ); |
|
553
|
break; |
|
554
|
} |
|
555
|
return (i<FOSSIL_TIMER_COUNT) ? i+1 : 0; |
|
556
|
} |
|
557
|
|
|
558
|
/* |
|
559
|
** Returns the difference in CPU times in microseconds since |
|
560
|
** fossil_timer_start() was called and returned the given timer ID (or |
|
561
|
** since it was last reset). Returns 0 if timerId is out of range. |
|
562
|
*/ |
|
563
|
sqlite3_uint64 fossil_timer_fetch(int timerId){ |
|
564
|
if( timerId>0 && timerId<=FOSSIL_TIMER_COUNT ){ |
|
565
|
struct FossilTimer * start = &fossilTimerList[timerId-1]; |
|
566
|
if( !start->id ){ |
|
567
|
fossil_panic("Invalid call to fetch a non-allocated " |
|
568
|
"timer (#%d)", timerId); |
|
569
|
/*NOTREACHED*/ |
|
570
|
}else{ |
|
571
|
sqlite3_uint64 eu = 0, es = 0; |
|
572
|
fossil_cpu_times( &eu, &es ); |
|
573
|
return (eu - start->u) + (es - start->s); |
|
574
|
} |
|
575
|
} |
|
576
|
return 0; |
|
577
|
} |
|
578
|
|
|
579
|
/* |
|
580
|
** Resets the timer associated with the given ID, as obtained via |
|
581
|
** fossil_timer_start(), to the current CPU time values. |
|
582
|
*/ |
|
583
|
sqlite3_uint64 fossil_timer_reset(int timerId){ |
|
584
|
if( timerId>0 && timerId<=FOSSIL_TIMER_COUNT ){ |
|
585
|
struct FossilTimer * start = &fossilTimerList[timerId-1]; |
|
586
|
if( !start->id ){ |
|
587
|
fossil_panic("Invalid call to reset a non-allocated " |
|
588
|
"timer (#%d)", timerId); |
|
589
|
/*NOTREACHED*/ |
|
590
|
}else{ |
|
591
|
sqlite3_uint64 const rc = fossil_timer_fetch(timerId); |
|
592
|
fossil_cpu_times( &start->u, &start->s ); |
|
593
|
return rc; |
|
594
|
} |
|
595
|
} |
|
596
|
return 0; |
|
597
|
} |
|
598
|
|
|
599
|
/** |
|
600
|
"Deallocates" the fossil timer identified by the given timer ID. |
|
601
|
returns the difference (in uSec) between the last time that timer |
|
602
|
was started or reset. Returns 0 if timerId is out of range (but |
|
603
|
note that, due to system-level precision restrictions, this |
|
604
|
function might return 0 on success, too!). It is not legal to |
|
605
|
re-use the passed-in timerId after calling this until/unless it is |
|
606
|
re-initialized using fossil_timer_start() (NOT |
|
607
|
fossil_timer_reset()). |
|
608
|
*/ |
|
609
|
sqlite3_uint64 fossil_timer_stop(int timerId){ |
|
610
|
if(timerId<1 || timerId>FOSSIL_TIMER_COUNT){ |
|
611
|
return 0; |
|
612
|
}else{ |
|
613
|
sqlite3_uint64 const rc = fossil_timer_fetch(timerId); |
|
614
|
struct FossilTimer * t = &fossilTimerList[timerId-1]; |
|
615
|
t->id = 0; |
|
616
|
t->u = t->s = 0U; |
|
617
|
return rc; |
|
618
|
} |
|
619
|
} |
|
620
|
|
|
621
|
/* |
|
622
|
** Returns true (non-0) if the given timer ID (as returned from |
|
623
|
** fossil_timer_start() is currently active. |
|
624
|
*/ |
|
625
|
int fossil_timer_is_active( int timerId ){ |
|
626
|
if(timerId<1 || timerId>FOSSIL_TIMER_COUNT){ |
|
627
|
return 0; |
|
628
|
}else{ |
|
629
|
const int rc = fossilTimerList[timerId-1].id; |
|
630
|
assert(!rc || (rc == timerId)); |
|
631
|
return fossilTimerList[timerId-1].id; |
|
632
|
} |
|
633
|
} |
|
634
|
|
|
635
|
/* |
|
636
|
** Return TRUE if fd is a valid open file descriptor. This only |
|
637
|
** works on unix. The function always returns true on Windows. |
|
638
|
*/ |
|
639
|
int is_valid_fd(int fd){ |
|
640
|
#ifdef _WIN32 |
|
641
|
return 1; |
|
642
|
#else |
|
643
|
return fcntl(fd, F_GETFL)!=(-1) || errno!=EBADF; |
|
644
|
#endif |
|
645
|
} |
|
646
|
|
|
647
|
/* |
|
648
|
** Returns TRUE if zSym is exactly HNAME_LEN_SHA1 or HNAME_LEN_K256 |
|
649
|
** bytes long and contains only lower-case ASCII hexadecimal values. |
|
650
|
*/ |
|
651
|
int fossil_is_artifact_hash(const char *zSym){ |
|
652
|
int sz = zSym ? (int)strlen(zSym) : 0; |
|
653
|
return (HNAME_LEN_SHA1==sz || HNAME_LEN_K256==sz) && validate16(zSym, sz); |
|
654
|
} |
|
655
|
|
|
656
|
/* |
|
657
|
** Return true if the input string is NULL or all whitespace. |
|
658
|
** Return false if the input string contains text. |
|
659
|
*/ |
|
660
|
int fossil_all_whitespace(const char *z){ |
|
661
|
if( z==0 ) return 1; |
|
662
|
while( fossil_isspace(z[0]) ){ z++; } |
|
663
|
return z[0]==0; |
|
664
|
} |
|
665
|
|
|
666
|
/* |
|
667
|
** Return the name of the users preferred text editor. Return NULL if |
|
668
|
** not found. |
|
669
|
** |
|
670
|
** Search algorithm: |
|
671
|
** (1) The value of the --editor command-line argument |
|
672
|
** (2) The local "editor" setting |
|
673
|
** (3) The global "editor" setting |
|
674
|
** (4) The VISUAL environment variable |
|
675
|
** (5) The EDITOR environment variable |
|
676
|
** (6) Any of several common editors that might be available, such as: |
|
677
|
** notepad, nano, pico, jove, edit, vi, vim, ed |
|
678
|
** |
|
679
|
** The search only occurs once, the first time this routine is called. |
|
680
|
** Second and subsequent invocations always return the same value. |
|
681
|
*/ |
|
682
|
const char *fossil_text_editor(void){ |
|
683
|
static const char *zEditor = 0; |
|
684
|
const char *azStdEd[] = { |
|
685
|
#ifdef _WIN32 |
|
686
|
"notepad", |
|
687
|
#endif |
|
688
|
"nano", "pico", "jove", "edit", "vi", "vim", "ed" |
|
689
|
}; |
|
690
|
int i = 0; |
|
691
|
if( zEditor==0 ){ |
|
692
|
zEditor = find_option("editor",0,1); |
|
693
|
} |
|
694
|
if( zEditor==0 ){ |
|
695
|
zEditor = db_get("editor", 0); |
|
696
|
} |
|
697
|
if( zEditor==0 ){ |
|
698
|
zEditor = fossil_getenv("VISUAL"); |
|
699
|
} |
|
700
|
if( zEditor==0 ){ |
|
701
|
zEditor = fossil_getenv("EDITOR"); |
|
702
|
} |
|
703
|
while( zEditor==0 && i<count(azStdEd) ){ |
|
704
|
if( fossil_app_on_path(azStdEd[i],0) ){ |
|
705
|
zEditor = azStdEd[i]; |
|
706
|
}else{ |
|
707
|
i++; |
|
708
|
} |
|
709
|
} |
|
710
|
if( zEditor && is_false(zEditor) ) zEditor = 0; |
|
711
|
return zEditor; |
|
712
|
} |
|
713
|
|
|
714
|
/* |
|
715
|
** Construct a temporary filename. |
|
716
|
** |
|
717
|
** The returned string is obtained from sqlite3_malloc() and must be |
|
718
|
** freed by the caller. |
|
719
|
** |
|
720
|
** See also: file_tempname() and file_time_timename(); |
|
721
|
*/ |
|
722
|
char *fossil_temp_filename(void){ |
|
723
|
char *zTFile = 0; |
|
724
|
const char *zDir; |
|
725
|
char cDirSep; |
|
726
|
char zSep[2]; |
|
727
|
size_t nDir; |
|
728
|
u64 r[2]; |
|
729
|
#ifdef _WIN32 |
|
730
|
char *zTempDirA = NULL; |
|
731
|
WCHAR zTempDirW[MAX_PATH+1]; |
|
732
|
const DWORD dwTempSizeW = sizeof(zTempDirW)/sizeof(zTempDirW[0]); |
|
733
|
DWORD dwTempLenW; |
|
734
|
#else |
|
735
|
int i; |
|
736
|
static const char *azTmp[] = {"/var/tmp","/usr/tmp","/tmp"}; |
|
737
|
#endif |
|
738
|
if( g.db ){ |
|
739
|
sqlite3_file_control(g.db, 0, SQLITE_FCNTL_TEMPFILENAME, (void*)&zTFile); |
|
740
|
if( zTFile ) return zTFile; |
|
741
|
} |
|
742
|
sqlite3_randomness(sizeof(r), &r); |
|
743
|
#if _WIN32 |
|
744
|
cDirSep = '\\'; |
|
745
|
dwTempLenW = GetTempPathW(dwTempSizeW, zTempDirW); |
|
746
|
if( dwTempLenW>0 && dwTempLenW<dwTempSizeW |
|
747
|
&& ( zTempDirA = fossil_path_to_utf8(zTempDirW) )){ |
|
748
|
zDir = zTempDirA; |
|
749
|
}else{ |
|
750
|
zDir = fossil_getenv("LOCALAPPDATA"); |
|
751
|
if( zDir==0 ) zDir = "."; |
|
752
|
} |
|
753
|
#else |
|
754
|
for(i=0; i<(int)(sizeof(azTmp)/sizeof(azTmp[0])); i++){ |
|
755
|
struct stat buf; |
|
756
|
zDir = azTmp[i]; |
|
757
|
if( stat(zDir,&buf)==0 && S_ISDIR(buf.st_mode) && access(zDir,03)==0 ){ |
|
758
|
break; |
|
759
|
} |
|
760
|
} |
|
761
|
if( i>=(int)(sizeof(azTmp)/sizeof(azTmp[0])) ) zDir = "."; |
|
762
|
cDirSep = '/'; |
|
763
|
#endif |
|
764
|
nDir = strlen(zDir); |
|
765
|
zSep[1] = 0; |
|
766
|
zSep[0] = (nDir && zDir[nDir-1]==cDirSep) ? 0 : cDirSep; |
|
767
|
zTFile = sqlite3_mprintf("%s%sfossil%016llx%016llx", zDir,zSep,r[0],r[1]); |
|
768
|
#ifdef _WIN32 |
|
769
|
if( zTempDirA ) fossil_path_free(zTempDirA); |
|
770
|
#endif |
|
771
|
return zTFile; |
|
772
|
} |
|
773
|
|
|
774
|
/* |
|
775
|
** Turn memory limits for stack and heap on and off. The argument |
|
776
|
** is true to turn memory limits on and false to turn them off. |
|
777
|
** |
|
778
|
** Memory limits should be enabled at startup, but then turned off |
|
779
|
** before starting subprocesses. |
|
780
|
*/ |
|
781
|
void fossil_limit_memory(int onOff){ |
|
782
|
#if defined(__unix__) |
|
783
|
static sqlite3_int64 origHeap = 10000000000LL; /* 10GB */ |
|
784
|
static sqlite3_int64 origStack = 8000000 ; /* 8MB */ |
|
785
|
struct rlimit x; |
|
786
|
|
|
787
|
#if defined(RLIMIT_DATA) |
|
788
|
getrlimit(RLIMIT_DATA, &x); |
|
789
|
if( onOff ){ |
|
790
|
origHeap = x.rlim_cur; |
|
791
|
if( sizeof(void*)<8 || sizeof(x.rlim_cur)<8 ){ |
|
792
|
x.rlim_cur = 1000000000 ; /* 1GB on 32-bit systems */ |
|
793
|
}else{ |
|
794
|
x.rlim_cur = 10000000000LL; /* 10GB on 64-bit systems */ |
|
795
|
} |
|
796
|
}else{ |
|
797
|
x.rlim_cur = origHeap; |
|
798
|
} |
|
799
|
setrlimit(RLIMIT_DATA, &x); |
|
800
|
#endif /* defined(RLIMIT_DATA) */ |
|
801
|
#if defined(RLIMIT_STACK) |
|
802
|
getrlimit(RLIMIT_STACK, &x); |
|
803
|
if( onOff ){ |
|
804
|
origStack = x.rlim_cur; |
|
805
|
x.rlim_cur = 8000000; /* 8MB */ |
|
806
|
}else{ |
|
807
|
x.rlim_cur = origStack; |
|
808
|
} |
|
809
|
setrlimit(RLIMIT_STACK, &x); |
|
810
|
#endif /* defined(RLIMIT_STACK) */ |
|
811
|
#endif /* defined(__unix__) */ |
|
812
|
} |
|
813
|
|
|
814
|
#if defined(HAVE_PLEDGE) |
|
815
|
/* |
|
816
|
** Interface to pledge() on OpenBSD 5.9 and later. |
|
817
|
** |
|
818
|
** On platforms that have pledge(), use this routine. |
|
819
|
** On all other platforms, this routine does not exist, but instead |
|
820
|
** a macro defined in config.h is used to provide a no-op. |
|
821
|
*/ |
|
822
|
void fossil_pledge(const char *promises){ |
|
823
|
if( pledge(promises, 0) ){ |
|
824
|
fossil_panic("pledge(\"%s\",NULL) fails with errno=%d", |
|
825
|
promises, (int)errno); |
|
826
|
} |
|
827
|
} |
|
828
|
#endif /* defined(HAVE_PLEDGE) */ |
|
829
|
|
|
830
|
/* |
|
831
|
** Construct a random password and return it as a string. N is the |
|
832
|
** recommended number of characters for the password. |
|
833
|
** |
|
834
|
** Space to hold the returned string is obtained from fossil_malloc() |
|
835
|
** and should be freed by the caller. |
|
836
|
*/ |
|
837
|
char *fossil_random_password(int N){ |
|
838
|
char zSrc[60]; |
|
839
|
int nSrc; |
|
840
|
int i; |
|
841
|
char z[60]; |
|
842
|
|
|
843
|
/* Source characters for the password. Omit characters like "0", "O", |
|
844
|
** "1" and "I" that might be easily confused */ |
|
845
|
static const char zAlphabet[] = |
|
846
|
/* 0 1 2 3 4 5 */ |
|
847
|
/* 123456789 123456789 123456789 123456789 123456789 123456 */ |
|
848
|
"23456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"; |
|
849
|
|
|
850
|
if( N<8 ) N = 8; |
|
851
|
nSrc = sizeof(zAlphabet) - 1; |
|
852
|
if( N>nSrc ) N = nSrc; |
|
853
|
memcpy(zSrc, zAlphabet, nSrc); |
|
854
|
|
|
855
|
for(i=0; i<N; i++){ |
|
856
|
unsigned r; |
|
857
|
sqlite3_randomness(sizeof(r), &r); |
|
858
|
r %= nSrc; |
|
859
|
z[i] = zSrc[r]; |
|
860
|
zSrc[r] = zSrc[--nSrc]; |
|
861
|
} |
|
862
|
z[i] = 0; |
|
863
|
return fossil_strdup(z); |
|
864
|
} |
|
865
|
|
|
866
|
/* |
|
867
|
** COMMAND: test-random-password |
|
868
|
** |
|
869
|
** Usage: %fossil test-random-password [N] [--entropy] |
|
870
|
** |
|
871
|
** Generate a random password string of approximately N characters in length. |
|
872
|
** If N is omitted, use 12. Values of N less than 8 are changed to 8 |
|
873
|
** and greater than 57 and changed to 57. |
|
874
|
** |
|
875
|
** If the --entropy flag is included, the number of bits of entropy in |
|
876
|
** the password is show as well. |
|
877
|
*/ |
|
878
|
void test_random_password(void){ |
|
879
|
int N = 12; |
|
880
|
int showEntropy = 0; |
|
881
|
int i; |
|
882
|
char *zPassword; |
|
883
|
for(i=2; i<g.argc; i++){ |
|
884
|
const char *z = g.argv[i]; |
|
885
|
if( z[0]=='-' && z[1]=='-' ) z++; |
|
886
|
if( strcmp(z,"-entropy")==0 ){ |
|
887
|
showEntropy = 1; |
|
888
|
}else if( fossil_isdigit(z[0]) ){ |
|
889
|
N = atoi(z); |
|
890
|
if( N<8 ) N = 8; |
|
891
|
if( N>57 ) N = 57; |
|
892
|
}else{ |
|
893
|
usage("[N] [--entropy]"); |
|
894
|
} |
|
895
|
} |
|
896
|
zPassword = fossil_random_password(N); |
|
897
|
if( showEntropy ){ |
|
898
|
double et = 57.0; |
|
899
|
for(i=1; i<N; i++) et *= 57-i; |
|
900
|
fossil_print("%s (%d bits of entropy)\n", zPassword, |
|
901
|
(int)(log(et)/log(2.0))); |
|
902
|
}else{ |
|
903
|
fossil_print("%s\n", zPassword); |
|
904
|
} |
|
905
|
fossil_free(zPassword); |
|
906
|
} |
|
907
|
|
|
908
|
/* |
|
909
|
** Generate a version 4 ("random"), variant 1 UUID (RFC 9562, Section 5.4). |
|
910
|
** |
|
911
|
** Format: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx |
|
912
|
** where M=4 and N=8, 9, a, or b (this leaves 122 random bits) |
|
913
|
*/ |
|
914
|
char* fossil_generate_uuid() { |
|
915
|
static const char zDigits[] = "0123456789abcdef"; |
|
916
|
unsigned char aBlob[16]; |
|
917
|
unsigned char zStr[37]; |
|
918
|
unsigned char *p = zStr; |
|
919
|
int i, k; |
|
920
|
|
|
921
|
sqlite3_randomness(16, aBlob); |
|
922
|
aBlob[6] = (aBlob[6]&0x0f) + 0x40; /* Version byte: 0100 xxxx */ |
|
923
|
aBlob[8] = (aBlob[8]&0x3f) + 0x80; /* Variant byte: 10xx xxxx */ |
|
924
|
|
|
925
|
for(i=0, k=0x550; i<16; i++, k=k>>1){ |
|
926
|
if( k&1 ){ |
|
927
|
*p++ = '-'; /* Add a dash after byte 4, 6, 8, and 12 */ |
|
928
|
} |
|
929
|
*p++ = zDigits[aBlob[i]>>4]; |
|
930
|
*p++ = zDigits[aBlob[i]&0xf]; |
|
931
|
} |
|
932
|
*p = 0; |
|
933
|
|
|
934
|
return fossil_strdup((char*)zStr); |
|
935
|
} |
|
936
|
|
|
937
|
/* |
|
938
|
** COMMAND: test-generate-uuid |
|
939
|
** |
|
940
|
** Usage: %fossil test-generate-uuid |
|
941
|
** |
|
942
|
** Generate a version 4 ("random"), variant 1 UUID (RFC 9562, Section 5.4): |
|
943
|
** |
|
944
|
** xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx - where M=4 and N=8, 9, a, or b |
|
945
|
*/ |
|
946
|
void test_generate_uuid(void){ |
|
947
|
fossil_print("%s\n", fossil_generate_uuid()); |
|
948
|
} |
|
949
|
|
|
950
|
/* |
|
951
|
** Return the number of decimal digits in a nonnegative integer. This is useful |
|
952
|
** when formatting text. |
|
953
|
*/ |
|
954
|
int fossil_num_digits(int n){ |
|
955
|
return n< 10 ? 1 : n< 100 ? 2 : n< 1000 ? 3 |
|
956
|
: n< 10000 ? 4 : n< 100000 ? 5 : n< 1000000 ? 6 |
|
957
|
: n<10000000 ? 7 : n<100000000 ? 8 : n<1000000000 ? 9 : 10; |
|
958
|
} |
|
959
|
|
|
960
|
/* |
|
961
|
** Search for an executable on the PATH environment variable. |
|
962
|
** Return true (1) if found and false (0) if not found. |
|
963
|
** |
|
964
|
** Print the full pathname of the first location if ePrint==1. Print |
|
965
|
** all pathnames for the executable if ePrint==2 or more. |
|
966
|
*/ |
|
967
|
int fossil_app_on_path(const char *zBinary, int ePrint){ |
|
968
|
const char *zPath = fossil_getenv("PATH"); |
|
969
|
char *zFull; |
|
970
|
int i; |
|
971
|
int bExists; |
|
972
|
int bFound = 0; |
|
973
|
while( zPath && zPath[0] ){ |
|
974
|
#ifdef _WIN32 |
|
975
|
while( zPath[0]==';' ) zPath++; |
|
976
|
for(i=0; zPath[i] && zPath[i]!=';'; i++){} |
|
977
|
zFull = mprintf("%.*s\\%s.exe", i, zPath, zBinary); |
|
978
|
bExists = file_access(zFull, R_OK); |
|
979
|
if( bExists!=0 ){ |
|
980
|
fossil_free(zFull); |
|
981
|
zFull = mprintf("%.*s\\%s.bat", i, zPath, zBinary); |
|
982
|
bExists = file_access(zFull, R_OK); |
|
983
|
} |
|
984
|
#else |
|
985
|
while( zPath[0]==':' ) zPath++; |
|
986
|
for(i=0; zPath[i] && zPath[i]!=':'; i++){} |
|
987
|
zFull = mprintf("%.*s/%s", i, zPath, zBinary); |
|
988
|
bExists = file_access(zFull, X_OK); |
|
989
|
#endif |
|
990
|
if( bExists==0 && ePrint ){ |
|
991
|
fossil_print("%s\n", zFull); |
|
992
|
} |
|
993
|
fossil_free(zFull); |
|
994
|
if( bExists==0 ){ |
|
995
|
if( ePrint<2 ) return 1; |
|
996
|
bFound = 1; |
|
997
|
} |
|
998
|
zPath += i; |
|
999
|
} |
|
1000
|
return bFound; |
|
1001
|
} |
|
1002
|
|
|
1003
|
/* |
|
1004
|
** Return the name of a command that will launch a web-browser. |
|
1005
|
*/ |
|
1006
|
const char *fossil_web_browser(void){ |
|
1007
|
const char *zBrowser = 0; |
|
1008
|
#if defined(_WIN32) |
|
1009
|
zBrowser = db_get("web-browser", "start \"\""); |
|
1010
|
#elif defined(__DARWIN__) || defined(__APPLE__) || defined(__HAIKU__) |
|
1011
|
zBrowser = db_get("web-browser", "open"); |
|
1012
|
#else |
|
1013
|
zBrowser = db_get("web-browser", 0); |
|
1014
|
if( zBrowser==0 ){ |
|
1015
|
static const char *const azBrowserProg[] = |
|
1016
|
{ "xdg-open", "gnome-open", "firefox", "google-chrome" }; |
|
1017
|
int i; |
|
1018
|
zBrowser = "echo"; |
|
1019
|
for(i=0; i<count(azBrowserProg); i++){ |
|
1020
|
if( fossil_app_on_path(azBrowserProg[i],0) ){ |
|
1021
|
zBrowser = azBrowserProg[i]; |
|
1022
|
break; |
|
1023
|
} |
|
1024
|
} |
|
1025
|
zBrowser = mprintf("%s 2>/dev/null", zBrowser); |
|
1026
|
} |
|
1027
|
#endif |
|
1028
|
return zBrowser; |
|
1029
|
} |
|
1030
|
|
|
1031
|
/* |
|
1032
|
** On non-Windows systems, calls nice(2) with the given level. Errors |
|
1033
|
** are ignored. On Windows this is a no-op. |
|
1034
|
*/ |
|
1035
|
void fossil_nice(int level){ |
|
1036
|
#ifndef _WIN32 |
|
1037
|
/* dummy if() condition to avoid nuisance warning about unused result on |
|
1038
|
certain compiler */ |
|
1039
|
if( nice(level) ){ /*ignored*/ } |
|
1040
|
#else |
|
1041
|
(void)level; |
|
1042
|
#endif |
|
1043
|
} |
|
1044
|
|
|
1045
|
/* |
|
1046
|
** Calls fossil_nice() with a default level. |
|
1047
|
*/ |
|
1048
|
void fossil_nice_default(void){ |
|
1049
|
fossil_nice(19); |
|
1050
|
} |
|
1051
|
|