X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=exec.c;h=bbf1b41addf8aab65363065c9e3b6ad91cae4968;hp=42a183a435e29cd764faf867a5804b1ea90f96fd;hb=e6940831fbcf21dd0e6243ca89ea0c7f8b195d9e;hpb=471684761a2039bbc89aa1e3c33c62de6bef86cf diff --git a/exec.c b/exec.c index 42a183a4..bbf1b41a 100644 --- a/exec.c +++ b/exec.c @@ -1,28 +1,28 @@ /* - * Copyright (C) 2003-2006 Andre Noll + * Copyright (C) 2003-2008 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ -/** \file exec.c helper functions for spawning new processes */ +/** \file exec.c Helper functions for spawning new processes. */ #include "para.h" #include "close_on_fork.h" #include "error.h" #include "string.h" /** - * spawn a new process and redirect fd 0, 1, and 2 + * Spawn a new process and redirect fd 0, 1, and 2. * - * \param pid will hold the pid of the created process upon return - * \param file path of the executable to execute - * \param args the argument array for the command - * \param fds a pointer to a value-result array + * \param pid Will hold the pid of the created process upon return. + * \param file Path of the executable to execute. + * \param args The argument array for the command. + * \param fds a Pointer to a value-result array. * - * \return Negative on errors, positive on success. + * \return Standard. * - * \sa null(4), pipe(2), dup2(2), fork(2), exec(3) + * \sa null(4), pipe(2), dup2(2), fork(2), exec(3). */ -static int para_exec(pid_t *pid, const char *file, char *const args[], int *fds) +static int para_exec(pid_t *pid, const char *file, char *const *const args, int *fds) { int ret, in[2] = {-1, -1}, out[2] = {-1, -1}, err[2] = {-1, -1}, null = -1; /* ;) */ @@ -106,32 +106,32 @@ err_out: return ret; } - /** - * exec the given command + * Exec the given command. * - * \param pid will hold the pid of the created process upon return - * \param cmdline holds the command and its arguments, seperated by spaces - * \param fds a pointer to a value-result array + * \param pid Will hold the pid of the created process upon return. + * \param cmdline Holds the command and its arguments, seperated by spaces. + * \param fds A pointer to a value-result array. * * This function uses fork/exec to create a new process. \a fds must be a * pointer to three integers, corresponding to stdin, stdout and stderr * respectively. It specifies how to deal with fd 0, 1, 2 in the child. The * contents of \a fds are interpreted as follows: * - * - fd[i] < 0: leave fd \a i alone - * - fd[i] = 0: dup fd \a i to /dev/null + * - fd[i] < 0: leave fd \a i alone. + * - fd[i] = 0: dup fd \a i to \p /dev/null. * - fd[i] > 0: create a pipe and dup i to one end of that pipe. * Upon return, fd[i] contains the file descriptor of the pipe. * * In any case, all unneeded filedescriptors are closed. * - * \return positive on success, negative on errors + * \return Standard. */ int para_exec_cmdline_pid(pid_t *pid, const char *cmdline, int *fds) { int argc, ret; - char **argv, *tmp = para_strdup(cmdline); + char **argv; + char *tmp = para_strdup(cmdline); if (!tmp) exit(EXIT_FAILURE); @@ -141,4 +141,3 @@ int para_exec_cmdline_pid(pid_t *pid, const char *cmdline, int *fds) free(tmp); return ret; } -