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scrut(1): replace do/while loop

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dtb 2024-07-19 19:31:34 -06:00
parent 9086bf0d08
commit 19eee6b4e5
Signed by: trinity
GPG Key ID: 34C0543BBB6AF81B
1 changed files with 39 additions and 61 deletions
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100
src/scrut.c
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@ -26,87 +26,65 @@
* S_ISFIFO, S_ISGID, S_ISREG, S_ISLNK, S_ISSOCK, * S_ISFIFO, S_ISGID, S_ISREG, S_ISLNK, S_ISSOCK,
* S_ISUID, S_ISVTX */ * S_ISUID, S_ISVTX */
static char args[] = "bcdefghkprsuwxLS"; char *program_name = "scrut";
static char ops[(sizeof args) / (sizeof *args)]; static char args[] = "bcdefgkprsuwxLS";
static char *program_name = "scrut";
int usage(char *s) { int usage(char *s) {
fprintf( fprintf(stderr, "Usage: %s [-%s] file...\n", s, args);
stderr,
"Usage: %s [-%s] file...\n",
s == NULL ? program_name : s, args
);
return EX_USAGE; return EX_USAGE;
} }
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
struct stat buf; char sel[(sizeof args) / (sizeof *args)];
int c;
size_t i;
char *p;
if (argc < 2) { return usage(argv[0]); } if (argc < 2) { return usage(argv[0] == NULL ? program_name : argv[0]); }
memset(ops, '\0', sizeof ops); { /* option parsing */
while ((c = getopt(argc, argv, args)) != -1) { char *p;
if ((p = strchr(args, c)) == NULL) {
return usage(argv[0]); memset(sel, '\0', sizeof sel);
} else { for (int c; (c = getopt(argc, argv, args)) != -1;) {
ops[p - args] = c; if ((p = strchr(args, c)) == NULL) { return usage(argv[0]); }
else { sel[p - args] = c; }
} }
}
/* straighten out ops */ /* straighten out selections */
for (i = 0, p = ops; i < (sizeof ops) / (sizeof *ops); ++i) { for (size_t i = 0, p = sel; i < (sizeof sel) / (sizeof *sel); ++i) {
if (ops[i] != '\0') { if (sel[i] != '\0') {
*p = ops[i]; *p = sel[i];
if (&ops[i] != p++) { ops[i] = '\0'; } if (&sel[i] != p++) { sel[i] = '\0'; }
}
} }
} }
if (optind == argc) { return usage(argv[0]); } if (optind == argc) { return usage(argv[0]); }
argv += optind; for (argv += optind ; *argv != NULL; ++argv) {
do { /* while(*++argv != NULL); */ struct stat buf;
if(access(*argv, F_OK) != 0 || lstat(*argv, &buf) == -1) { if(access(*argv, F_OK) != 0 || lstat(*argv, &buf) == -1) {
return EXIT_FAILURE; /* doesn't exist or isn't stattable */ return EXIT_FAILURE; /* doesn't exist or isn't stattable */
} }
for (i = 0; ops[i] != '\0'; ++i) for (size_t i = 0; sel[i] != '\0'; ++i) {
if (ops[i] == 'e') { if (
continue; (sel[i] == 'b' && !S_ISBLK(buf.st_mode))
} else if (ops[i] == 'h') { || (sel[i] == 'c' && !S_ISCHR(buf.st_mode))
return usage(argv[0]); || (sel[i] == 'd' && !S_ISDIR(buf.st_mode))
} else if ( || (sel[i] == 'e' && 0)
(ops[i] == 'b' || (sel[i] == 'f' && !S_ISREG(buf.st_mode))
&& !S_ISBLK(buf.st_mode)) || (sel[i] == 'g' && !(buf.st_mode & S_ISGID))
|| (ops[i] == 'c' || (sel[i] == 'k' && !(buf.st_mode & S_ISVTX))
&& !S_ISCHR(buf.st_mode)) || (sel[i] == 'p' && !S_ISFIFO(buf.st_mode))
|| (ops[i] == 'd' || (sel[i] == 'r' && access(*argv, R_OK) != 0)
&& !S_ISDIR(buf.st_mode)) || (sel[i] == 'u' && !(buf.st_mode & S_ISUID))
|| (ops[i] == 'f' || (sel[i] == 'w' && access(*argv, W_OK) != 0)
&& !S_ISREG(buf.st_mode)) || (sel[i] == 'x' && access(*argv, X_OK) != 0)
|| (ops[i] == 'g' || (sel[i] == 'L' && !S_ISLNK(buf.st_mode))
&& !(buf.st_mode & S_ISGID)) || (sel[i] == 'S' && !S_ISSOCK(buf.st_mode))
|| (ops[i] == 'k'
&& !(buf.st_mode & S_ISVTX))
|| (ops[i] == 'p'
&& !S_ISFIFO(buf.st_mode))
|| (ops[i] == 'r'
&& access(*argv, R_OK) != 0)
|| (ops[i] == 'u'
&& !(buf.st_mode & S_ISUID))
|| (ops[i] == 'w'
&& access(*argv, W_OK) != 0)
|| (ops[i] == 'x'
&& access(*argv, X_OK) != 0)
|| (ops[i] == 'L'
&& !S_ISLNK(buf.st_mode))
|| (ops[i] == 'S'
&& !S_ISSOCK(buf.st_mode))
) { return EXIT_FAILURE; } ) { return EXIT_FAILURE; }
} while(*++argv != NULL); }
}
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }