From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/process/execl.c | 20 ++++++++++++++++++++ src/process/execle.c | 22 ++++++++++++++++++++++ src/process/execlp.c | 20 ++++++++++++++++++++ src/process/execv.c | 8 ++++++++ src/process/execve.c | 8 ++++++++ src/process/execvp.c | 34 ++++++++++++++++++++++++++++++++++ src/process/fork.c | 9 +++++++++ src/process/system.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ src/process/vfork.c | 8 ++++++++ src/process/wait.c | 6 ++++++ src/process/waitid.c | 7 +++++++ src/process/waitpid.c | 7 +++++++ 12 files changed, 194 insertions(+) create mode 100644 src/process/execl.c create mode 100644 src/process/execle.c create mode 100644 src/process/execlp.c create mode 100644 src/process/execv.c create mode 100644 src/process/execve.c create mode 100644 src/process/execvp.c create mode 100644 src/process/fork.c create mode 100644 src/process/system.c create mode 100644 src/process/vfork.c create mode 100644 src/process/wait.c create mode 100644 src/process/waitid.c create mode 100644 src/process/waitpid.c (limited to 'src/process') diff --git a/src/process/execl.c b/src/process/execl.c new file mode 100644 index 00000000..4c6eaa94 --- /dev/null +++ b/src/process/execl.c @@ -0,0 +1,20 @@ +#include +#include + +int execl(const char *path, ...) +{ + int argc; + va_list ap; + va_start(ap, path); + for (argc=0; va_arg(ap, const char *); argc++); + va_end(ap); + { + int i; + char *argv[argc+1]; + va_start(ap, path); + for (i=0; i +#include + +int execle(const char *path, ...) +{ + int argc; + va_list ap; + va_start(ap, path); + for (argc=0; va_arg(ap, const char *); argc++); + va_end(ap); + { + int i; + char *argv[argc+1]; + char **envp; + va_start(ap, path); + for (i=0; i +#include + +int execlp(const char *file, ...) +{ + int argc; + va_list ap; + va_start(ap, file); + for (argc=0; va_arg(ap, const char *); argc++); + va_end(ap); + { + int i; + char *argv[argc+1]; + va_start(ap, file); + for (i=0; i + +extern char **__environ; + +int execv(const char *path, char *const argv[]) +{ + return execve(path, argv, __environ); +} diff --git a/src/process/execve.c b/src/process/execve.c new file mode 100644 index 00000000..2a0b62d6 --- /dev/null +++ b/src/process/execve.c @@ -0,0 +1,8 @@ +#include +#include "syscall.h" + +int execve(const char *path, char *const argv[], char *const envp[]) +{ + /* do we need to use environ if envp is null? */ + return syscall3(__NR_execve, (long)path, (long)argv, (long)envp); +} diff --git a/src/process/execvp.c b/src/process/execvp.c new file mode 100644 index 00000000..d799ddae --- /dev/null +++ b/src/process/execvp.c @@ -0,0 +1,34 @@ +#include +#include +#include +#include + +extern char **__environ; + +int execvp(const char *file, char *const argv[]) +{ + const char *p, *z, *path = getenv("PATH"); + int l; + + if (strchr(file, '/')) + return execve(file, argv, __environ); + + /* FIXME: integer overflows */ + if (!path) path = "/usr/local/bin:/bin:/usr/bin"; + l = strlen(file) + strlen(path) + 2; + + for(p=path; p && *p; p=z) { + char b[l]; + z = strchr(p, ':'); + if (z) { + memcpy(b, p, z-p); + b[z++-p] = 0; + } else strcpy(b, p); + strcat(b, "/"); + strcat(b, file); + if (!access(b, X_OK)) + return execve(b, argv, __environ); + } + errno = ENOENT; + return -1; +} diff --git a/src/process/fork.c b/src/process/fork.c new file mode 100644 index 00000000..1213f0f5 --- /dev/null +++ b/src/process/fork.c @@ -0,0 +1,9 @@ +#include +#include "syscall.h" + +/* FIXME: add support for atfork stupidity */ + +pid_t fork(void) +{ + return syscall0(__NR_fork); +} diff --git a/src/process/system.c b/src/process/system.c new file mode 100644 index 00000000..0f1c07b5 --- /dev/null +++ b/src/process/system.c @@ -0,0 +1,45 @@ +#include +#include +#include +#include +#include + +int system(const char *cmd) +{ + pid_t pid; + sigset_t old, new; + struct sigaction sa, oldint, oldquit; + int status; + + if (!cmd) return 1; + + sa.sa_handler = SIG_IGN; + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + + sigaction(SIGINT, &sa, &oldint); + sigaction(SIGQUIT, &sa, &oldquit); + sigaddset(&sa.sa_mask, SIGCHLD); + sigprocmask(SIG_BLOCK, &new, &old); + + pid = fork(); + if (pid <= 0) { + sigaction(SIGINT, &oldint, NULL); + sigaction(SIGQUIT, &oldquit, NULL); + sigprocmask(SIG_SETMASK, &old, NULL); + if (pid == 0) { + execl("/bin/sh", "sh", "-c", cmd, (char *)0); + _exit(127); + } + return -1; + } + while (waitpid(pid, &status, 0) == -1) + if (errno != EINTR) { + status = -1; + break; + } + sigaction(SIGINT, &oldint, NULL); + sigaction(SIGQUIT, &oldquit, NULL); + sigprocmask(SIG_SETMASK, &old, NULL); + return status; +} diff --git a/src/process/vfork.c b/src/process/vfork.c new file mode 100644 index 00000000..32a7a6ed --- /dev/null +++ b/src/process/vfork.c @@ -0,0 +1,8 @@ +#include +#include "syscall.h" + +pid_t vfork(void) +{ + /* vfork syscall cannot be made from C code */ + return syscall0(__NR_fork); +} diff --git a/src/process/wait.c b/src/process/wait.c new file mode 100644 index 00000000..34da102d --- /dev/null +++ b/src/process/wait.c @@ -0,0 +1,6 @@ +#include + +pid_t wait(int *status) +{ + return waitpid((pid_t)-1, status, 0); +} diff --git a/src/process/waitid.c b/src/process/waitid.c new file mode 100644 index 00000000..0ec0d55c --- /dev/null +++ b/src/process/waitid.c @@ -0,0 +1,7 @@ +#include +#include "syscall.h" + +int waitid(idtype_t type, id_t id, siginfo_t *info, int options) +{ + return syscall5(__NR_waitid, type, id, (long)info, options, 0); +} diff --git a/src/process/waitpid.c b/src/process/waitpid.c new file mode 100644 index 00000000..0ddcd15a --- /dev/null +++ b/src/process/waitpid.c @@ -0,0 +1,7 @@ +#include +#include "syscall.h" + +pid_t waitpid(pid_t pid, int *status, int options) +{ + return syscall4(__NR_wait4, pid, (long)status, options, 0); +} -- cgit v1.2.1