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update cmp, grep

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This commit is contained in:
Connor Lane Smith
2011-06-18 06:42:24 +01:00
parent f24772dcbb
commit 8ec404cdec
3 changed files with 27 additions and 33 deletions
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29
grep.c
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@@ -5,6 +5,9 @@
#include <stdlib.h>
#include <unistd.h>
#include "text.h"
#include "util.h"
enum { Match = 0, NoMatch = 1, Error = 2 };
static void grep(FILE *, const char *, regex_t *);
@@ -39,27 +42,22 @@ main(int argc, char *argv[])
vflag = true;
break;
default:
exit(2);
exit(Error);
}
if(optind == argc) {
fprintf(stderr, "usage: %s [-Ecilnqv] pattern [files...]\n", argv[0]);
exit(2);
}
if(optind == argc)
enprintf(Error, "usage: %s [-Ecilnqv] pattern [files...]\n", argv[0]);
regcomp(&preg, argv[optind++], flags);
many = (argc > optind+1);
if(optind == argc)
grep(stdin, "<stdin>", &preg);
else for(; optind < argc; optind++) {
if(!(fp = fopen(argv[optind], "r"))) {
fprintf(stderr, "fopen %s: ", argv[optind]);
perror(NULL);
exit(2);
}
if(!(fp = fopen(argv[optind], "r")))
enprintf(Error, "fopen %s:", argv[optind]);
grep(fp, argv[optind], &preg);
fclose(fp);
}
return match ? 0 : 1;
return match ? Match : NoMatch;
}
void
@@ -80,7 +78,7 @@ grep(FILE *fp, const char *str, regex_t *preg)
puts(str);
goto end;
case 'q':
exit(0);
exit(Match);
default:
if(many)
printf("%s:", str);
@@ -94,10 +92,7 @@ grep(FILE *fp, const char *str, regex_t *preg)
if(mode == 'c')
printf("%ld\n", c);
end:
if(ferror(fp)) {
fprintf(stderr, "%s: read error: ", str);
perror(NULL);
exit(2);
}
if(ferror(fp))
enprintf(Error, "%s: read error:", str);
free(buf);
}