diff options
Diffstat (limited to 'build_tools/vercomp.c')
| -rwxr-xr-x | build_tools/vercomp.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/build_tools/vercomp.c b/build_tools/vercomp.c new file mode 100755 index 000000000..acc32f181 --- /dev/null +++ b/build_tools/vercomp.c @@ -0,0 +1,349 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * A simple program version comparison tool. + * + * Copyright (C) 2005, Steven Michael Murphy (murf at e-tools dot com). + * + * This program is free software, distributed under the terms of + * the GNU General Public License + */ + +/* vercomp.c + args: <program> <comparison> <version> + + where: + + program = path to program (bison or flex) + comparison = ">", "<", "<=", ">=", "=" -- depending on shell, you may have to use backslash escapes + version = a version compare against, say 1.875, or 2.5.4, or whatever. + +*/ + +#include <stdio.h> +#include <string.h> + +char *program_version[5]; +char *arg_version[5]; + +void get_program_version_string(char *command, char *output) +{ + char cbuf[8000]; + char pbuf[8000]; + char zbuf[8000]; + char *res; + FILE *p1; + + zbuf[0] = 0; + + sprintf( cbuf, "%s --version", command ); + p1 = popen(cbuf, "r"); + if( !p1 ) + { + fprintf(stderr,"vercomp: Could not execute the command: %s\n", command); + exit(125); + } + /* the first line is the magic one */ + res = fgets(zbuf, 8000, p1); + /* clear the trailing blank */ + if( zbuf[strlen(zbuf)-1] == '\n' ) + zbuf[strlen(zbuf)-1] = 0; + /* the rest is cruft, just empty the input stream */ + while( res ) + { + res = fgets(pbuf, 8000, p1); + } + /* close the stream. Hopefully, we have what we need */ + pclose(p1); + /* all we want is the last "word"-- so find the last blank, and grab everything after that */ + + res = strrchr(zbuf,' '); + if( !res ) + { + fprintf(stderr,"Something is wrong with the version string: %s\n", zbuf); + exit(124); + } + strcpy(output,res+1); +} + + +void extract_version(char *ver_string, char **where) +{ + int i=0; + char *p=ver_string; + + while( p && *p ) + { + where[i++] = p; + p = strchr(p,'.'); + if( p ) + { + *p= 0; + p++; + } + } +} + +void compare_versions(char *compare_func) +{ + int i; + + for(i=0;i<5;i++) + { + /* start out at the beginning, then go to the end */ + if( program_version[i] && arg_version[i] && *program_version[i] && *arg_version[i] ) + { + + if( strlen(program_version[i]) == strspn(program_version[i],"0123456789") + && strlen(arg_version[i]) == strspn(arg_version[i],"0123456789") ) + { + /* just pure numbers -- do a numeric compare */ + int pv = atoi(program_version[i]); + int av = atoi(arg_version[i]); + + if( pv < av ) + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("true\n"); + exit(0); + } + } + else if( pv > av ) + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("false\n"); + exit(0); + } + } + } + else + { + /* other junk thrown in -- do string compare */ + int res = strcmp(program_version[i], arg_version[i]); + if( res < 0 ) /* prog is less than arg */ + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("true\n"); + exit(0); + } + } + else if( res > 0 ) /* prog is greater than arg */ + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("false\n"); + exit(0); + } + } + } + } + else if( program_version[i] && *program_version[i] ) + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("false\n"); + exit(0); + } + + } + else if( arg_version[i] && *arg_version[i] ) + { + if( !strcmp(compare_func,"=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("true\n"); + exit(0); + } + } + else + break; + } + if( !strcmp(compare_func,"=") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, ">") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, "<") ) + { + printf("false\n"); + exit(0); + } + else if( !strcmp(compare_func, ">=") ) + { + printf("true\n"); + exit(0); + } + else if( !strcmp(compare_func, "<=") ) + { + printf("true\n"); + exit(0); + } +} + +void usage(void) +{ + printf("Usage: <program-path> <comparison> <version>\n\ +\n\ + where:\n\ +\n\ + program-path = path to program (bison or flex)\n\ + comparison = '>', '<', '<=', '>=', '=' -- depending on shell, you may have to use backslash escapes\n\ + version = a version compare against, say 1.875, or 2.5.4, or whatever.\n\n"); +} + + +int main(int argc, char **argv) +{ + char program_version_string[8000]; + + /* before starting, check args and make sure all is OK */ + if( argc < 4 || argc > 4 ) + { + usage(); + exit(-256); + } + if ( strcmp(argv[2],"=") && strcmp(argv[2],">") && strcmp(argv[2],"<") && strcmp(argv[2],">=") && strcmp(argv[2],"<=") ) + { + fprintf(stderr,"vercomp: ILLEGAL input Comparison value: %s\n\n", argv[2]); + usage(); + exit(-256); + } + + /* first, extract a version from the command line arg */ + extract_version(argv[3], arg_version); + + /* next, extract a version from the command line */ + get_program_version_string(argv[1], program_version_string); + extract_version(program_version_string, program_version); + + /* next compare and return result */ + compare_versions(argv[2]); + /* the above func shouldn't return */ +} |