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- send status msgs to stderr vice stdout

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- ensure that the user specified a flag, else popen will get a NULL mode
  parameter
This commit is contained in:
gdr 1997-09-21 16:33:49 +00:00
parent 314f3fcee0
commit db4bce6e93
1 changed files with 10 additions and 7 deletions
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17
lib/libc/tests/gen/popen.c
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@ -1,7 +1,7 @@
/*
* Test by Devin Reade
*
* $Id: popen.c,v 1.1 1997/02/28 05:12:52 gdr Exp $
* $Id: popen.c,v 1.2 1997/09/21 16:33:49 gdr Exp $
*/
#include <stdio.h>
@ -15,7 +15,7 @@ int main (int argc, char **argv) {
FILE *fp;
int errflag = 0;
int c;
char *mode;
char *mode = NULL;
while ((c = getopt(argc, argv, "rw")) != EOF) {
switch (c) {
@ -33,19 +33,22 @@ int main (int argc, char **argv) {
if (errflag) {
exit(1);
}
if (argc - optind != 1) {
errx(1,"one argument required");
if ((argc - optind != 1) || (mode == NULL)) {
errx(1,"one flag and one argument required");
}
if ((fp = popen(argv[optind], mode)) == NULL) {
perror("popen failed");
exit(1);
err(1, "popen failed");
}
fprintf(stderr, "popen passed, starting loop\n");
while (fgets(buffer, BUFFERSIZE, fp) != NULL) {
printf("T: %s", buffer);
fprintf(stderr, "T: %s", buffer);
}
printf("now doing pclose\n");
fprintf(stderr, "now doing pclose\n");
c = pclose(fp);
printf("pclose returned %d\n", c);
fprintf(stderr, "pclose returned %d\n", c);
return c;
}