9fd4a745f8
For loop detection, a history is mandatory. In the process of also adding a flexible struct to recurse, the recurse-definition was moved to fs.h. The motivation behind the struct is to allow easy extensions to the recurse-function without having to change the prototypes of all functions in the process. Adding flags is really simple as well now. Using the recursor-struct, it's also easier to see which defaults apply to a program (for instance, which type of follow, ...). Another change was to add proper stat-lstat-usage in recurse. It was wrong before.
90 lines
1.5 KiB
C
90 lines
1.5 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <errno.h>
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#include <grp.h>
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#include <unistd.h>
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#include "fs.h"
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#include "util.h"
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static struct stat st;
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static int hflag = 0;
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static int Rflag = 0;
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static gid_t gid = -1;
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static int ret = 0;
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static void
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chgrp(const char *path, void *data, struct recursor *r)
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{
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char *chownf_name;
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int (*chownf)(const char *, uid_t, gid_t);
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if (r->follow == 'P' || (r->follow == 'H' && r->depth) || (hflag && !(r->depth))) {
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chownf_name = "lchown";
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chownf = lchown;
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} else {
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chownf_name = "chown";
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chownf = chown;
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}
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if (chownf(path, st.st_uid, gid) < 0) {
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weprintf("%s %s:", chownf_name, path);
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ret = 1;
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} else if (Rflag) {
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recurse(path, NULL, r);
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}
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}
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static void
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usage(void)
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{
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eprintf("usage: chgrp [-h] [-R [-H | -L | -P]] group file ...\n");
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}
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int
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main(int argc, char *argv[])
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{
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struct group *gr;
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struct recursor r = { .fn = chgrp, .hist = NULL, .depth = 0, .follow = 'P', .flags = 0 };
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ARGBEGIN {
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case 'h':
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hflag = 1;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'H':
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case 'L':
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case 'P':
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r.follow = ARGC();
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break;
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default:
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usage();
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} ARGEND;
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if (argc < 2)
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usage();
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errno = 0;
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if (!(gr = getgrnam(argv[0]))) {
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if (errno)
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eprintf("getgrnam %s:", argv[0]);
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else
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eprintf("getgrnam %s: no such group\n", argv[0]);
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}
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gid = gr->gr_gid;
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for (argc--, argv++; *argv; argc--, argv++) {
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if (stat(*argv, &st) < 0) {
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weprintf("stat %s:", *argv);
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ret = 1;
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continue;
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}
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chgrp(*argv, NULL, &r);
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}
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return ret || recurse_status;
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}
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