diff options
Diffstat (limited to 'man3/popen.3')
| -rw-r--r-- | man3/popen.3 | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/man3/popen.3 b/man3/popen.3 index c56d938e4..683f5649a 100644 --- a/man3/popen.3 +++ b/man3/popen.3 @@ -26,7 +26,7 @@ Standard C library .P .RS -4 Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): +.MR feature_test_macros 7 ): .RE .P .BR popen (), @@ -67,7 +67,7 @@ to be set on the underlying file descriptor; see the description of the .B O_CLOEXEC flag in -.BR open (2) +.MR open 2 for reasons why this may be useful. .P The return value from @@ -76,7 +76,7 @@ is a normal standard I/O stream in all respects save that it must be closed with .BR pclose () rather than -.BR fclose (3). +.MR fclose 3 . Writing to such a stream writes to the standard input of the command; the command's standard output is the same as that of the process that called .BR popen (), @@ -94,15 +94,15 @@ The .BR pclose () function waits for the associated process to terminate and returns the exit status of the command as returned by -.BR wait4 (2). +.MR wait4 2 . .SH RETURN VALUE .BR popen (): on success, returns a pointer to an open stream that can be used to read or write to the pipe; if the -.BR fork (2) +.MR fork 2 or -.BR pipe (2) +.MR pipe 2 calls fail, or if the function cannot allocate memory, NULL is returned. .P @@ -114,7 +114,7 @@ on success, returns the exit status of the command; if .\" is not associated with a "popen()ed" command, if .\".I stream .\" already "pclose()d", or if -.BR wait4 (2) +.MR wait4 2 returns an error, or some other error is detected, \-1 is returned. .P @@ -128,9 +128,9 @@ function does not set .I errno if memory allocation fails. If the underlying -.BR fork (2) +.MR fork 2 or -.BR pipe (2) +.MR pipe 2 fails, .I errno is set to indicate the error. @@ -149,7 +149,7 @@ is set to .BR ECHILD . .SH ATTRIBUTES For an explanation of the terms used in this section, see -.BR attributes (7). +.MR attributes 7 . .TS allbox; lbx lb lb @@ -172,7 +172,7 @@ POSIX.1-2008. POSIX.1-2001. .SH CAVEATS Carefully read Caveats in -.BR system (3). +.MR system 3 . .SH BUGS Since the standard input of a command opened for reading shares its seek offset with the process that called @@ -183,7 +183,7 @@ Similarly, the output from a command opened for writing may become intermingled with that of the original process. The latter can be avoided by calling -.BR fflush (3) +.MR fflush 3 before .BR popen (). .P @@ -197,12 +197,12 @@ The only hint is an exit status of 127. .\" .BR pclose () .\" function appeared in Version 7 AT&T UNIX. .SH SEE ALSO -.BR sh (1), -.BR fork (2), -.BR pipe (2), -.BR wait4 (2), -.BR fclose (3), -.BR fflush (3), -.BR fopen (3), -.BR stdio (3), -.BR system (3) +.MR sh 1 , +.MR fork 2 , +.MR pipe 2 , +.MR wait4 2 , +.MR fclose 3 , +.MR fflush 3 , +.MR fopen 3 , +.MR stdio 3 , +.MR system 3 |