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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:24 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:24 +0000 |
commit | 2d240c706fdccd408ed0ae47d59a98203f024d77 (patch) | |
tree | ba3d7ec67413ccec2cd03bd12993b1704642a7a6 /debian/bash.preinst-lib.c | |
parent | Adding upstream version 5.0. (diff) | |
download | bash-2d240c706fdccd408ed0ae47d59a98203f024d77.tar.xz bash-2d240c706fdccd408ed0ae47d59a98203f024d77.zip |
Adding debian version 5.0-4.debian/5.0-4debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/bash.preinst-lib.c')
-rw-r--r-- | debian/bash.preinst-lib.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/debian/bash.preinst-lib.c b/debian/bash.preinst-lib.c new file mode 100644 index 0000000..87497b6 --- /dev/null +++ b/debian/bash.preinst-lib.c @@ -0,0 +1,131 @@ +/* + * This file is in the public domain. + * You may freely use, modify, distribute, and relicense it. + */ + +#include "bash.preinst.h" +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/wait.h> +#include <unistd.h> +#include <fcntl.h> +#include <spawn.h> + +extern char **environ; + +__attribute__((format(printf, 1, 0))) +static void vreportf(const char *err, va_list params, int errnum) +{ + fprintf(stderr, "bash.preinst: "); + vfprintf(stderr, err, params); + if (errnum) + fprintf(stderr, ": %s", strerror(errnum)); + fprintf(stderr, "\n"); +} + +__attribute__((format(printf, 1, 2))) +NORETURN void die_errno(const char *fmt, ...) +{ + va_list params; + va_start(params, fmt); + vreportf(fmt, params, errno); + va_end(params); + exit(1); +} + +__attribute__((format(printf, 1, 2))) +NORETURN void die(const char *fmt, ...) +{ + va_list params; + va_start(params, fmt); + vreportf(fmt, params, 0); + va_end(params); + exit(1); +} + +int exists(const char *file) +{ + struct stat sb; + if (!lstat(file, &sb)) + return 1; + if (errno == ENOENT) + return 0; + die_errno("cannot get status of %s", file); +} + +void set_cloexec(int fd) +{ + int flags = fcntl(fd, F_GETFD); + if (flags < 0 || fcntl(fd, F_SETFD, flags | FD_CLOEXEC)) + die_errno("cannot set close-on-exec flag"); +} + +void xpipe(int pipefd[2]) +{ + if (pipe(pipefd)) + die_errno("cannot create pipe"); + set_cloexec(pipefd[0]); + set_cloexec(pipefd[1]); +} + +void wait_or_die(pid_t child, const char *name, int flags) +{ + int status; + if (waitpid(child, &status, 0) != child) + die_errno("cannot wait for %s", name); + if ((WIFEXITED(status) && WEXITSTATUS(status) == 0) || + ((flags & ERROR_OK) && WIFEXITED(status)) || + ((flags & SIGPIPE_OK) && + WIFSIGNALED(status) && WTERMSIG(status) == SIGPIPE)) + return; + + if (WIFEXITED(status)) + die("%s exited with status %d", name, WEXITSTATUS(status)); + if (WIFSIGNALED(status)) + die("%s killed by signal %d", name, WTERMSIG(status)); + if (WIFSTOPPED(status)) + die("%s stopped by signal %d", name, WSTOPSIG(status)); + die("waitpid is confused (status=%d)", status); +} + +pid_t spawn(const char * const cmd[], int out, int err) +{ + pid_t child; + posix_spawn_file_actions_t redir; + + if (posix_spawn_file_actions_init(&redir) || + (out >= 0 && posix_spawn_file_actions_adddup2(&redir, out, 1)) || + (err >= 0 && posix_spawn_file_actions_adddup2(&redir, err, 2)) || + posix_spawnp(&child, cmd[0], &redir, NULL, + (char **) cmd, environ) || + posix_spawn_file_actions_destroy(&redir)) + die_errno("cannot run %s", cmd[0]); + return child; +} + +void run(const char * const cmd[]) +{ + pid_t child = spawn(cmd, -1, -1); + wait_or_die(child, cmd[0], 0); +} + +FILE *spawn_pipe(pid_t *pid, const char * const cmd[], int errfd) +{ + int pipefd[2]; + FILE *f; + + xpipe(pipefd); + *pid = spawn(cmd, pipefd[1], errfd); + if (close(pipefd[1]) || (errfd != -1 && close(errfd))) + die_errno("cannot close unneeded fd"); + + f = fdopen(pipefd[0], "r"); + if (!f) + die_errno("cannot stream read end of pipe"); + return f; +} |