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feat(userspace/libc): implement system() function

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
This commit is contained in:
EnderIce2 2025-02-20 02:07:04 +02:00
parent b1a107fb65
commit 123d11e4e3
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2 changed files with 51 additions and 2 deletions
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2
Userspace/libc/include/stdlib.h
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@ -103,7 +103,7 @@ extern "C"
long strtol(const char *restrict nptr, char **restrict endptr, int base); long strtol(const char *restrict nptr, char **restrict endptr, int base);
long long strtoll(const char *restrict nptr, char **restrict endptr, int base); long long strtoll(const char *restrict nptr, char **restrict endptr, int base);
unsigned long int strtoul(const char *, char **, int); unsigned long int strtoul(const char *, char **, int);
int system(const char *); int system(const char *command);
int ttyslot(void); int ttyslot(void);
int unlockpt(int); int unlockpt(int);
void *valloc(size_t); void *valloc(size_t);

51
Userspace/libc/src/std/stdlib.c
View File

@ -330,7 +330,56 @@ export long long strtoll(const char *restrict nptr, char **restrict endptr, int
} }
export unsigned long int strtoul(const char *, char **, int); export unsigned long int strtoul(const char *, char **, int);
export int system(const char *);
export int system(const char *command)
{
if (command == NULL)
return 1;
pid_t pid;
int status;
struct sigaction sa, old_int, old_quit;
sigset_t new_mask, old_mask;
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGINT, &sa, &old_int);
sigaction(SIGQUIT, &sa, &old_quit);
sigemptyset(&new_mask);
sigaddset(&new_mask, SIGCHLD);
sigprocmask(SIG_BLOCK, &new_mask, &old_mask);
if ((pid = fork()) == 0)
{
sigaction(SIGINT, &old_int, NULL);
sigaction(SIGQUIT, &old_quit, NULL);
sigprocmask(SIG_SETMASK, &old_mask, NULL);
execl("/bin/sh", "sh", "-c", command, (char *)0);
_exit(127);
}
if (pid == -1)
status = -1;
else
{
while (waitpid(pid, &status, 0) == -1)
{
if (errno != EINTR)
{
status = -1;
break;
}
}
}
sigaction(SIGINT, &old_int, NULL);
sigaction(SIGQUIT, &old_quit, NULL);
sigprocmask(SIG_SETMASK, &old_mask, NULL);
return status;
}
export int ttyslot(void); export int ttyslot(void);
export int unlockpt(int); export int unlockpt(int);
export void *valloc(size_t); export void *valloc(size_t);