Kind_Foxie/micro-utils
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Big update: 4/N fix

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This commit is contained in:
Your Name 2023-11-07 16:56:14 +03:00
parent b3740af244
commit 935b750eb5
5 changed files with 124 additions and 95 deletions
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27
coreutils/printenv.c
View File

@ -1,9 +1,10 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
unsigned int nullline;
int printvars(const int len, const char **names) {
int printvars(int len, char **names) {
int ret = 0;
for (int i = 0; i < len; i++) {
@ -19,27 +20,29 @@ int printvars(const int len, const char **names) {
return ret;
}
int main(const int argc, const char **argv, const char **envp) {
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
int main(int argc, char **argv, const char **envp) {
int opt;
while ((opt = getopt(argc, argv, "0")) != -1) {
switch (opt) {
case '0':
nullline = 1;
break;
else if (!strcmp(argv[i], "-0"))
nullline = 1;
else if (!strcmp(argv[i], "--help")) {
printf("printenv [-n end each output line with NUL, not newline]\n");
default:
printf("printenv [var1 var2...]\n\t[-n end each output line with NUL]\n");
return 0;
}
}
if (i == argc)
argv += optind;
argc -= optind;
if (argc == 0)
while (*envp)
printf("%s%c", *envp++, (nullline == 1) ? 0 : '\n');
else
return printvars(argc - i, argv + i);
return printvars(argc, argv);
return 0;
}

54
coreutils/shred.c
View File

@ -42,40 +42,48 @@ int shred(int rand_fd, int fd) {
return 0;
}
int main(const int argc, const char **argv) {
int main(int argc, char **argv) {
n_loops = 3;
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
int opt;
while ((opt = getopt(argc, argv, "fuzn:")) != -1) {
switch (opt) {
case 'f':
f_flag = 1;
break;
else if (!strcmp(argv[i], "-f"))
f_flag = 1;
else if (!strcmp(argv[i], "-u"))
case 'u':
u_flag = 1;
break;
else if (!strcmp(argv[i], "-z"))
case 'z':
z_flag = 1;
break;
else if (!strncmp(argv[i], "-n=", 3))
n_loops = atoi(argv[i] + 3);
case 'n':
n_loops = atoi(optarg);
break;
else if (!strcmp(argv[i], "--help")) {
printf("shred [-n=N Overwrite N times (default 3)] [-z Final overwrite with zeros] [-u Remove file] [-f Chmod to ensure writability] [file file2...]\n");
default:
printf("shred [file1 file2...]\n\t[-n N Overwrite N times, default 3]\n\t[-z Final overwrite with zeros]\n\t[-u Remove file] [-f Chmod to ensure writability]\n");
return 0;
}
}
argv += optind;
argc -= optind;
if (argc == 0) {
fprintf(stderr, "shred: missing operand\n");
return 1;
}
}
int rand_fd = open(RAND_SOURCE, O_RDONLY);
if (rand_fd < 0) {
fprintf(stderr, "shred: %s is %s\n", RAND_SOURCE, strerror(errno));
fprintf(stderr, "shred: %s: %s\n", RAND_SOURCE, strerror(errno));
return 1;
}
for (; i < argc; i++) {
for (int i = 0; i < argc; i++) {
int fd = open(argv[i], O_RDWR);
if (fd < 0) {
fprintf(stderr, "shred: %s is %s\n", argv[i], strerror(errno));
@ -86,15 +94,17 @@ int main(const int argc, const char **argv) {
fsync(fd);
close(fd);
if (u_flag)
if (unlink(argv[i]) < 0)
fprintf(stderr, "shred: %s is %s\n", argv[i], strerror(errno));
if (f_flag)
if (f_flag) {
if (chmod(argv[i], 0) < 0)
fprintf(stderr, "shred: %s is %s\n", argv[i], strerror(errno));
}
if (u_flag) {
if (unlink(argv[i]) < 0)
fprintf(stderr, "shred: %s is %s\n", argv[i], strerror(errno));
}
}
close(rand_fd);
return 0;
}

31
coreutils/truncate.c
View File

@ -5,28 +5,31 @@
#include <stdlib.h>
#include <unistd.h>
int main(const int argc, const char **argv) {
int main(int argc, char **argv) {
unsigned int c_flag = 0;
unsigned int s_size = 0;
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
int opt;
while ((opt = getopt(argc, argv, "s:c")) != -1) {
switch (opt) {
case 's':
s_size = atoi(optarg);
break;
else if (!strncmp(argv[i], "-s=", 3))
s_size = atoi(argv[i] + 3);
else if (!strcmp(argv[i], "-c"))
case 'c':
c_flag = 1;
break;
else if (!strcmp(argv[i], "--help")) {
printf("truncate [-c Do not create files] [-s=SIZE] file1 file2...\n");
default:
printf("truncate [file]\n\t[-c Do not create files] [-s=SIZE]\n");
return 0;
}
}
if (argc - i == 0) {
argv += optind;
argc -= optind;
if (argc == 0) {
fprintf(stderr, "truncate: missing operand\n");
return 1;
}
@ -35,15 +38,15 @@ int main(const int argc, const char **argv) {
if (!c_flag)
flags |= O_CREAT;
int fd = open(argv[i], flags, 0666);
int fd = open(argv[0], flags, 0666);
if (fd < 0) {
fprintf(stderr, "truncate %s %s\n", argv[i], strerror(errno));
fprintf(stderr, "truncate %s %s\n", argv[0], strerror(errno));
return 1;
}
if (ftruncate(fd, s_size) == -1) {
close(fd);
fprintf(stderr, "truncate %s %s\n", argv[i], strerror(errno));
fprintf(stderr, "truncate %s %s\n", argv[0], strerror(errno));
return 1;
}

33
coreutils/uname.c
View File

@ -1,6 +1,7 @@
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/utsname.h>
/* sys node release version machine */
@ -10,32 +11,40 @@ enum {
O_NODE,
O_RELEASE,
O_VERSION,
O_MACHINE
O_MACHINE,
O_ALL
};
int main(const int argc, const char **argv) {
for (int i = 0; i < argc; i++) {
if (!strcmp("-a", argv[i])) {
for (size_t i = 0; i < sizeof(flags) / sizeof(flags[0]); i++)
int main(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "ashrvm")) != -1) {
switch (opt) {
case 'a':
for (int i = 0; i < O_ALL; i++)
flags[i] = 1;
}
break;
else if (!strcmp("-s", argv[i]))
case 's':
flags[O_SYS] = 1;
break;
else if (!strcmp("-n", argv[i]))
case 'n':
flags[O_NODE] = 1;
break;
else if (!strcmp("-r", argv[i]))
case 'r':
flags[O_RELEASE] = 1;
break;
else if (!strcmp("-v", argv[i]))
case 'v':
flags[O_VERSION] = 1;
break;
else if (!strcmp("-m", argv[i]))
case 'm':
flags[O_MACHINE] = 1;
break;
else if (!strcmp("--help", argv[i])) {
default:
printf("uname [-a All] [-s Sys] [-n Nodename] [-r Release] [-v Version] [-m Machine]\n");
return 0;
}

30
coreutils/wc.c
View File

@ -60,27 +60,30 @@ void print_count(const char *path, unsigned int plines, unsigned int pwords, uns
printf(" %s\n", path);
}
int main(const int argc, const char **argv) {
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
int main(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "lcw")) != -1) {
switch (opt) {
case 'l':
l_flag = 1;
break;
else if (!strcmp(argv[i], "-l"))
l_flag = 1;
else if (!strcmp(argv[i], "-c"))
case 'c':
c_flag = 1;
break;
else if (!strcmp(argv[i], "-w"))
case 'w':
w_flag = 1;
break;
else if (!strcmp(argv[i], "--help")) {
printf("wc [-l lines] [-c bytes] [-w words] [file1 file2...]\n");
default:
printf("wc [file1 file2...]\n\t[-l Lines] [-c Bytes] [-w Words]\n");
return 0;
}
}
argv += optind;
argc -= optind;
if (!w_flag && !l_flag && !c_flag) {
w_flag = 1;
@ -88,12 +91,13 @@ int main(const int argc, const char **argv) {
c_flag = 1;
}
if (i == argc) {
if (argc == 0 || argv[0][0] == '-') {
count(STDIN_FILENO);
print_count("", lines, words, bytes);
return 0;
}
for (; i < argc; i++) {
for (int i = 0; i < argc; i++) {
int fd = open(argv[i], O_RDONLY);
if (fd < 0) {
fprintf(stderr, "wc: %s\n", strerror(errno));