SYSTEM(3) Library Functions Manual SYSTEM(3)NAME
system - issue a shell command
int system(const char *string)
System causes the string to be given to sh(1) as input as if the string had been typed as a command at a terminal. The current process
waits until the shell has completed, then returns the exit status of the shell.
SEE ALSO sh(1), popen(3), execve(2), wait(2).
Exit status 127 indicates the shell couldn't be executed.
7th Edition May 15, 1985 SYSTEM(3)
Check Out this Related Man Page
SYSTEM(3) BSD Library Functions Manual SYSTEM(3)NAME
system -- pass a command to the shell
Standard C Library (libc, -lc)
system(const char *string);
The system() function hands the argument string to the command interpreter sh(1). The calling process waits for the shell to finish execut-
ing the command, ignoring SIGINT and SIGQUIT, and blocking SIGCHLD.
If string is a NULL pointer, system() will return non-zero if the command interpreter sh(1) is available, and zero if it is not.
The system() function returns the exit status of the shell as returned by waitpid(2), or -1 if an error occurred when invoking fork(2) or
waitpid(2). A return value of 127 means the execution of the shell failed.
SEE ALSO sh(1), execve(2), fork(2), waitpid(2), popen(3)STANDARDS
The system() function conforms to ISO/IEC 9899:1990 (``ISO C90'') and is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD June 4, 1993 BSD
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