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scrut(1): formatting, removes gotos

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This commit is contained in:
Emma Tebibyte 2024-07-12 16:04:07 -06:00
parent 6e1e3db6c8
commit 5d2872d050
Signed by untrusted user: emma
GPG Key ID: 06FA419A1698C270
1 changed files with 34 additions and 28 deletions
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52
src/scrut.c
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@ -20,9 +20,7 @@
#include <stdio.h> /* fprintf(3), stderr, NULL */
#include <stdlib.h> /* EXIT_FAILURE, EXIT_SUCCESS */
#include <string.h> /* memset(3), strchr(3) */
#ifndef EX_USAGE
#include <sysexits.h>
#endif
#include <unistd.h> /* access(3), getopt(3), F_OK, R_OK, W_OK, X_OK */
#include <sys/stat.h> /* lstat(3), stat struct, S_ISBLK, S_ISCHR, S_ISDIR,
* S_ISFIFO, S_ISGID, S_ISREG, S_ISLNK, S_ISSOCK,
@ -32,47 +30,55 @@ static char args[] = "bcdefghkprsuwxLS";
static char ops[(sizeof args) / (sizeof *args)];
static char *program_name = "scrut";
int usage(char *s) {
fprintf(
stderr,
"Usage: %s [-%s] file...\n",
s == NULL ? program_name : s, args
);
return EX_USAGE;
}
int main(int argc, char *argv[]) {
struct stat buf;
int c;
size_t i;
char *p;
if(argc < 2)
goto usage;
if (argc < 2) { return usage(argv[0]); }
memset(ops, '\0', sizeof ops);
while((c = getopt(argc, argv, args)) != -1)
if((p = strchr(args, c)) == NULL)
goto usage;
else
while ((c = getopt(argc, argv, args)) != -1) {
if ((p = strchr(args, c)) == NULL) {
return usage(argv[0]);
} else {
ops[p - args] = c;
}
}
/* straighten out ops */
for(i = 0, p = ops; i < (sizeof ops) / (sizeof *ops); ++i)
for (i = 0, p = ops; i < (sizeof ops) / (sizeof *ops); ++i) {
if(ops[i] != '\0'){
*p = ops[i];
if(&ops[i] != p++)
ops[i] = '\0';
}
}
if(optind == argc)
goto usage;
if (optind == argc) { return usage(argv[0]); }
argv += optind;
do{ if(access(*argv, F_OK) != 0 || lstat(*argv, &buf) == -1)
do { /* while(*++argv != NULL); */
if(access(*argv, F_OK) != 0 || lstat(*argv, &buf) == -1) {
return EXIT_FAILURE; /* doesn't exist or isn't stattable */
}
for (i = 0; ops[i] != '\0'; ++i)
if(ops[i] == 'e')
if (ops[i] == 'e') {
continue;
else if(ops[i] == 'h'){
usage: fprintf(stderr, "Usage: %s [-%s] file...\n",
argv[0] == NULL
? program_name
: argv[0],
args);
return EX_USAGE;
} else if (ops[i] == 'h') {
return usage(argv[0]);
} else if (
(ops[i] == 'b'
&& !S_ISBLK(buf.st_mode))
@ -99,8 +105,8 @@ usage: fprintf(stderr, "Usage: %s [-%s] file...\n",
|| (ops[i] == 'L'
&& !S_ISLNK(buf.st_mode))
|| (ops[i] == 'S'
&& !S_ISSOCK(buf.st_mode)))
return EXIT_FAILURE;
&& !S_ISSOCK(buf.st_mode))
) { return EXIT_FAILURE; }
} while(*++argv != NULL);
return EXIT_SUCCESS;