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micro-utils
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fixed

This commit is contained in:
usr 2024-06-18 13:17:56 +03:00
parent 6d01433421
commit e5b250b721
2 changed files with 97 additions and 85 deletions
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4
config.h
View File

@ -1,8 +1,8 @@
#ifndef _CONFIG_H
#define _CONFIG_H
/* (cat tee wc xargs rev split) text buffer */
#define BUF_SIZE 2048
/* (cat tee wc xargs rev split cp) text buffer */
#define BUF_SIZE 1024 * 1024
#ifdef _SHRED_C
/* Random source (shred) */

178
src/coreutils/cp/cp.c
View File

@ -6,112 +6,92 @@
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <limits.h>
#include <sys/mman.h>
#include "make_path.h"
#include "get_stat.h"
#include "config.h"
char *f_flag = "cp";
char r_flag;
char v_flag;
char L_flag;
int write_buffer(int mode, int ifd, int ofd, const char *dst) {
off_t len = lseek(ifd, 0, SEEK_END);
if (len <= 0) {
if (len < 0)
return 1;
char copy_reg(int mode, const char *src, const char *dst) {
int ret = 1;
int fd = open(dst, O_CREAT | O_RDONLY, mode);
if (fd < 0)
return 1;
close(fd);
return 0;
}
if (ftruncate(ofd, len) < 0)
return 1;
void *buf_in = mmap(NULL, len, PROT_READ, MAP_SHARED, ifd, 0);
if (buf_in == MAP_FAILED)
return 1;
void *buf_out = mmap(NULL, len, PROT_WRITE, MAP_SHARED, ofd, 0);
if (buf_out == MAP_FAILED)
return 1;
memcpy(buf_out, buf_in, len);
if (munmap(buf_in, len) || munmap(buf_out, len))
return 1;
return 0;
}
int copy(int mode, const char *src, const char *dst) {
int ifd = open(src, O_RDONLY);
if (ifd < 0)
return 1;
/* test ./testdir/ -> test ./testdir/test */
char *str_dup = NULL;
char *new_path = (char *)dst;
int flag = 0;
int ret = 0;
int ofd = open(dst, O_WRONLY | O_TRUNC | O_CREAT, mode);
if (ofd < 0)
goto CLOSE_OFD;
int ofd = open(dst, O_CREAT | O_TRUNC | O_RDWR, mode);
if (ofd < 0) {
ret = 1;
char buf[BUF_SIZE + 1];
while (1) {
ssize_t n = read(ifd, buf, sizeof(buf));
if (n <= 0) {
if (n < 0)
goto CLOSE;
str_dup = strdup(src);
if (str_dup == NULL)
break;
}
if (write(ofd, buf, n) != n)
goto CLOSE;
flag = 1;
new_path = NULL;
new_path = mu_make_path(f_flag, dst, basename(str_dup));
if (new_path == NULL)
goto CLOSE;
if (!strcmp(new_path, src) || !strcmp(new_path + 2, src))
goto CLOSE;
ofd = open(new_path, O_CREAT | O_TRUNC | O_RDWR, mode);
if (ofd < 0)
goto CLOSE;
ret = 0;
}
if (write_buffer(mode, ifd, ofd, new_path))
if (f_flag)
fprintf(stderr, "cp: (%s %s) %s\n", src, dst, strerror(errno));
close(ofd);
ret = 0;
CLOSE:
close(ifd);
if (flag) {
if (str_dup != NULL)
free(str_dup);
close(ofd);
if (new_path != NULL)
free(new_path);
CLOSE_OFD:
close(ifd);
return ret;
}
char copy_lnk(const char *src, const char *dst) {
char path[PATH_MAX + 1];
ssize_t ret = readlink(src, path, sizeof(path));
if (ret < 0)
return 1;
path[ret] = '\0';
if (symlink(path, dst) < 0)
return 1;
return 0;
}
char copy(struct stat st, const char *src, const char *dst) {
if (v_flag)
printf("Copying '%s' to '%s'\n", src, dst);
if (S_ISLNK(st.st_mode))
return copy_lnk(src, dst);
else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) || S_ISFIFO(st.st_mode)) {
if (mknod(dst, st.st_mode, st.st_dev) < 0)
return 1;
}
return ret;
else
return copy_reg(st.st_mode, src, dst);
return 0;
}
int cptree(const char *src, const char *dst) {
struct stat stat_path;
if (mu_get_lstat(f_flag, src, &stat_path))
if (mu_get_stats(f_flag, L_flag, src, &stat_path))
return 1;
if (!S_ISDIR(stat_path.st_mode)) {
if (copy(stat_path.st_mode, src, dst)) {
if (copy(stat_path, src, dst)) {
if (f_flag)
fprintf(stderr, "cp: (%s %s): copy() failed (%s)\n", src, dst, strerror(errno));
fprintf(stderr, "cp: %s: %s\n", dst, strerror(errno));
return 1;
}
@ -119,12 +99,17 @@ int cptree(const char *src, const char *dst) {
return 0;
}
else if (!r_flag)
return 0;
else if (!r_flag) {
fprintf(stderr, "cp: omitting directory: %s\n", dst);
return 1;
}
else if (mkdir(dst, 0777) < 0)
else if (mkdir(dst, 0777) < 0) {
if (f_flag)
fprintf(stderr, "cp: %s\n", strerror(errno));
fprintf(stderr, "cp: %s: %s\n", dst, strerror(errno));
return 1;
}
DIR *dir = opendir(src);
if (dir == NULL) {
@ -136,9 +121,26 @@ int cptree(const char *src, const char *dst) {
struct dirent *ep;
while ((ep = readdir(dir)) != NULL) {
if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, "..") || !strcmp(dst, ep->d_name))
if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
continue;
/* Check for recursion */
char *dup = strdup(dst);
if (dup != NULL) {
char *bname = basename(dup);
if (bname != NULL) {
if (!strcmp(bname, ep->d_name)) {
fprintf(stderr, "cp: recursion detected, omitting directory '%s'\n", dst);
free(dup);
continue;
}
}
free(dup);
}
/* Copy */
char *src_path = mu_make_path(f_flag, src, ep->d_name);
if (src_path == NULL)
continue;
@ -154,6 +156,8 @@ int cptree(const char *src, const char *dst) {
free(src_path);
free(dst_path);
if (ret)
break;
}
closedir(dir);
@ -162,7 +166,7 @@ int cptree(const char *src, const char *dst) {
int main(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "frR")) != -1) {
while ((opt = getopt(argc, argv, "frvL")) != -1) {
switch (opt) {
case 'f':
f_flag = NULL;
@ -172,8 +176,16 @@ int main(int argc, char **argv) {
r_flag = 1;
break;
case 'v':
v_flag = 1;
break;
case 'L':
L_flag = 1;
break;
default:
printf("cp [rf] [src1 src2...] [dst]\n\t-f Silent\n\t-r Recursive\n");
printf("cp [rfv] [src1 src2...] [dst]\n\t-f Silent\n\t-r Recursive\n\t-v Verbose\n\t-L Follow all symlinks\n");
return 0;
}
}