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	recurse.c - sbase - suckless unix tools
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	---
	recurse.c (2454B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <dirent.h>
	3 #include <errno.h>
	4 #include <fcntl.h>
	5 #include <limits.h>
	6 #include <stdio.h>
	7 #include <stdlib.h>
	8 #include <string.h>
	9 #include <sys/stat.h>
	10 #include <sys/types.h>
	11 #include <unistd.h>
	12
	13 #include "../fs.h"
	14 #include "../util.h"
	15
	16 int recurse_status = 0;
	17
	18 void
	19 recurse(int dirfd, const char name, void data, struct recursor *r)
	20 {
	21 struct dirent *d;
	22 struct history new, h;
	23 struct stat st, dst;
	24 DIR *dp;
	25 int flags = 0, fd;
	26 size_t pathlen = r->pathlen;
	27
	28 if (dirfd == AT_FDCWD)
	29 pathlen = estrlcpy(r->path, name, sizeof(r->path));
	30
	31 if (r->follow == 'P' \|\| (r->follow == 'H' && r->depth))
	32 flags \|= AT_SYMLINK_NOFOLLOW;
	33
	34 if (fstatat(dirfd, name, &st, flags) < 0) {
	35 if (!(r->flags & SILENT)) {
	36 weprintf("stat %s:", r->path);
	37 recurse_status = 1;
	38 }
	39 return;
	40 }
	41 if (!S_ISDIR(st.st_mode)) {
	42 r->fn(dirfd, name, &st, data, r);
	43 return;
	44 }
	45
	46 new = emalloc(sizeof(struct history));
	47 new->prev = r->hist;
	48 r->hist = new;
	49 new->dev = st.st_dev;
	50 new->ino = st.st_ino;
	51
	52 for (h = new->prev; h; h = h->prev)
	53 if (h->ino == st.st_ino && h->dev == st.st_dev)
	54 return;
	55
	56 if (!r->depth && (r->flags & DIRFIRST))
	57 r->fn(dirfd, name, &st, data, r);
	58
	59 if (!r->maxdepth \|\| r->depth + 1 < r->maxdepth) {
	60 fd = openat(dirfd, name, O_RDONLY \| O_CLOEXEC \| O_DIRECT…
	61 if (fd < 0) {
	62 weprintf("open %s:", r->path);
	63 recurse_status = 1;
	64 }
	65 if (!(dp = fdopendir(fd))) {
	66 if (!(r->flags & SILENT)) {
	67 weprintf("fdopendir:");
	68 recurse_status = 1;
	69 }
	70 return;
	71 }
	72 if (r->path[pathlen - 1] != '/')
	73 r->path[pathlen++] = '/';
	74 if (r->follow == 'H')
	75 flags \|= AT_SYMLINK_NOFOLLOW;
	76 while ((d = readdir(dp))) {
	77 if (!strcmp(d->d_name, ".") \|\| !strcmp(d->d_name…
	78 continue;
	79 r->pathlen = pathlen + estrlcpy(r->path + pathle…
	80 if (fstatat(fd, d->d_name, &dst, flags) < 0) {
	81 if (!(r->flags & SILENT)) {
	82 weprintf("stat %s:", r->path);
	83 recurse_status = 1;
	84 }
	85 } else if ((r->flags & SAMEDEV) && dst.st_dev !=…
	86 continue;
	87 } else {
	88 r->depth++;
	89 r->fn(fd, d->d_name, &dst, data, r);
	90 r->depth--;
	91 }
	92 }
	93 r->path[pathlen - 1] = '\0';
	94 r->pathlen = pathlen - 1;
	95 closedir(dp);
	96 }
	97
	98 if (!r->depth) {
	99 if (!(r->flags & DIRFIRST))
	100 r->fn(dirfd, name, &st, data, r);
	101
	102 while (r->hist) {
	103 h = r->hist;
	104 r->hist = r->hist->prev;
	105 free(h);
	106 }
	107 }
	108 }