pipecmd: reverse order of args to match documentation; add pipecmd_preserve.

[ccan] / ccan / pipecmd / test / run-preserve.c

diff --git a/ccan/pipecmd/test/run-preserve.c b/ccan/pipecmd/test/run-preserve.c
new file mode 100644 (file)
index 0000000..c9e7cd9
--- /dev/null
+++ b/ccan/pipecmd/test/run-preserve.c
@@ -0,0 +1,98 @@
+#include <ccan/pipecmd/pipecmd.h>
+/* Include the C files directly. */
+#include <ccan/pipecmd/pipecmd.c>
+#include <ccan/tap/tap.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char *argv[])
+{
+       pid_t child;
+       int fd, oldfd, status;
+       char buf[5] = "test";
+       char template[] = "/tmp/run-preserve.XXXXXX";
+
+       /* We call ourselves, to test pipe. */
+       if (argc == 2) {
+               if (strcmp(argv[1], "out") == 0) {
+                       if (write(STDOUT_FILENO, buf, sizeof(buf)) != sizeof(buf))
+                               exit(2);
+               } else if (strcmp(argv[1], "in") == 0) {
+                       if (read(STDIN_FILENO, buf, sizeof(buf)) != sizeof(buf))
+                               exit(3);
+                       if (memcmp(buf, "test", sizeof(buf)) != 0)
+                               exit(4);
+               } else if (strcmp(argv[1], "err") == 0) {
+                       if (write(STDERR_FILENO, buf, sizeof(buf)) != sizeof(buf))
+                               exit(5);
+               } else
+                       abort();
+               exit(0);
+       }
+
+       /* This is how many tests you plan to run */
+       plan_tests(25);
+
+       /* Preserve stdin test. */
+       fd = mkstemp(template);
+       ok1(write(fd, buf, sizeof(buf)) == sizeof(buf));
+       ok1(fd >= 0);
+       ok1(dup2(fd, STDIN_FILENO) == STDIN_FILENO);
+       ok1(lseek(STDIN_FILENO, 0, SEEK_SET) == 0);
+       child = pipecmd(&pipecmd_preserve, NULL, NULL, argv[0], "in", NULL);
+       if (!ok1(child > 0))
+               exit(1);
+       ok1(waitpid(child, &status, 0) == child);
+       ok1(WIFEXITED(status));
+       ok1(WEXITSTATUS(status) == 0);
+
+       close(STDIN_FILENO);
+
+       /* Preserve stdout test */
+       fd = open(template, O_WRONLY|O_TRUNC);
+       ok1(fd >= 0);
+       oldfd = dup(STDOUT_FILENO);
+       /* Can't use OK after this, since we mug stdout */
+       if (dup2(fd, STDOUT_FILENO) != STDOUT_FILENO)
+               exit(1);
+       child = pipecmd(NULL, &pipecmd_preserve, NULL, argv[0], "out", NULL);
+       if (child == -1)
+               exit(1);
+       /* Restore stdout */
+       dup2(oldfd, STDOUT_FILENO);
+       close(oldfd);
+       ok1(waitpid(child, &status, 0) == child);
+       ok1(WIFEXITED(status));
+       ok1(WEXITSTATUS(status) == 0);
+
+       fd = open(template, O_RDONLY);
+       ok1(read(fd, buf, sizeof(buf)) == sizeof(buf));
+       ok1(close(fd) == 0);
+       ok1(memcmp(buf, "test", sizeof(buf)) == 0);
+
+       /* Preserve stderr test. */
+       fd = open(template, O_WRONLY|O_TRUNC);
+       ok1(fd >= 0);
+       oldfd = dup(STDERR_FILENO);
+       ok1(dup2(fd, STDERR_FILENO) == STDERR_FILENO);
+       child = pipecmd(NULL, NULL, &pipecmd_preserve, argv[0], "err", NULL);
+       if (!ok1(child > 0))
+               exit(1);
+
+       /* Restore stderr. */
+       ok1(dup2(oldfd, STDERR_FILENO));
+       ok1(waitpid(child, &status, 0) == child);
+       ok1(WIFEXITED(status));
+       ok1(WEXITSTATUS(status) == 0);
+       close(oldfd);
+
+       fd = open(template, O_RDONLY);
+       ok1(read(fd, buf, sizeof(buf)) == sizeof(buf));
+       ok1(close(fd) == 0);
+       ok1(memcmp(buf, "test", sizeof(buf)) == 0);
+       unlink(template);
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}