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add simple_exec{ve,le}

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6773 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1999-08-09 14:01:48 +00:00
parent ae44a8a80b
commit 1b74520da7
2 changed files with 84 additions and 30 deletions
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2
lib/roken/roken-common.h
View File

@@ -213,8 +213,10 @@ SigAction signal(int iSig, SigAction pAction); /* BSD compatible */
#endif
#endif
int ROKEN_LIB_FUNCTION simple_execve(const char*, char*const[], char*const[]);
int ROKEN_LIB_FUNCTION simple_execvp(const char*, char *const[]);
int ROKEN_LIB_FUNCTION simple_execlp(const char*, ...);
int ROKEN_LIB_FUNCTION simple_execle(const char*, ...);
void ROKEN_LIB_FUNCTION print_version(const char *);

112
lib/roken/simple_exec.c
View File

@@ -69,6 +69,24 @@ RCSID("$Id$");
128- is 128 + signal that killed subprocess
*/
static int
check_status(pid_t pid)
{
while(1) {
int status;
while(waitpid(pid, &status, 0) < 0)
if (errno != EINTR)
return -3;
if(WIFSTOPPED(status))
continue;
if(WIFEXITED(status))
return WEXITSTATUS(status);
if(WIFSIGNALED(status))
return WTERMSIG(status) + 128;
}
}
int
simple_execvp(const char *file, char *const args[])
{
@@ -80,45 +98,79 @@ simple_execvp(const char *file, char *const args[])
execvp(file, args);
exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC);
default:
while(1) {
int status;
while(waitpid(pid, &status, 0) < 0)
if (errno != EINTR)
return -3;
if(WIFSTOPPED(status))
continue;
if(WIFEXITED(status))
return WEXITSTATUS(status);
if(WIFSIGNALED(status))
return WTERMSIG(status) + 128;
}
return check_status(pid);
}
}
/* gee, I'd like a execvpe */
int
simple_execve(const char *file, char *const args[], char *const envp[])
{
pid_t pid = fork();
switch(pid){
case -1:
return -2;
case 0:
execve(file, args, envp);
exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC);
default:
return check_status(pid);
}
}
static char **
collect_args(va_list *ap)
{
char **argv = NULL;
int argc = 0, i = 0;
do {
if(i == argc) {
/* realloc argv */
char **tmp = realloc(argv, (argc + 5) * sizeof(*argv));
if(tmp == NULL) {
errno = ENOMEM;
return NULL;
}
argv = tmp;
argc += 5;
}
argv[i++] = va_arg(*ap, char*);
} while(argv[i - 1] != NULL);
return argv;
}
int
simple_execlp(const char *file, ...)
{
va_list ap;
char **argv = NULL;
int argc, i;
char **argv;
int ret;
argc = i = 0;
va_start(ap, file);
do {
if(i == argc) {
char **tmp = realloc(argv, (argc + 5) * sizeof(*argv));
if(tmp == NULL) {
errno = ENOMEM;
return -1;
}
argv = tmp;
argc += 5;
}
argv[i++] = va_arg(ap, char*);
} while(argv[i - 1] != NULL);
argv = collect_args(&ap);
va_end(ap);
i = simple_execvp(file, argv);
if(argv == NULL)
return -1;
ret = simple_execvp(file, argv);
free(argv);
return i;
return ret;
}
int
simple_execle(const char *file, ... /* ,char *const envp[] */)
{
va_list ap;
char **argv;
char *const* envp;
int ret;
va_start(ap, file);
argv = collect_args(&ap);
envp = va_arg(ap, char **);
va_end(ap);
if(argv == NULL)
return -1;
ret = simple_execve(file, argv, envp);
free(argv);
return ret;
}