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grep: check regcomp succeeds

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This commit is contained in:
Connor Lane Smith 2012-05-12 17:54:36 +01:00
parent 6e0f5c1409
commit cd73d1b330
1 changed files with 7 additions and 2 deletions
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9
grep.c
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@ -20,7 +20,7 @@ int
main(int argc, char *argv[])
{
char c;
int flags = REG_NOSUB;
int n, flags = REG_NOSUB;
regex_t preg;
FILE *fp;
@ -46,8 +46,13 @@ main(int argc, char *argv[])
}
if(optind == argc)
enprintf(Error, "usage: %s [-Ecilnqv] pattern [files...]\n", argv[0]);
regcomp(&preg, argv[optind++], flags);
if((n = regcomp(&preg, argv[optind++], flags)) != 0) {
char buf[BUFSIZ];
regerror(n, &preg, buf, sizeof buf);
enprintf(Error, "%s\n", buf);
}
many = (argc > optind+1);
if(optind == argc)
grep(stdin, "<stdin>", &preg);