fish-shell/src/print_help.cpp

// Print help message for the specified command.
#include "config.h"  // IWYU pragma: keep

#include "print_help.h"

#include <stdio.h>
#include <stdlib.h>

#include <cstring>

#include "common.h"

constexpr int CMD_LEN = 1024;
constexpr char HELP_ERR[] = "Could not show help message\n";

void print_help(const char *c, int fd) {
    char cmd[CMD_LEN];
    int printed = snprintf(cmd, CMD_LEN, "fish -c '__fish_print_help %s >&%d'", c, fd);

    if (printed < CMD_LEN && system(cmd) == -1) {
        write_loop(2, HELP_ERR, const_strlen(HELP_ERR));
    }
}
restyle proc module to match project style Reduces lint errors from 134 to 101 (-25%). Line count from 1994 to 1466 (-26%). Another step in resolving issue #2902. 2016-05-02 21:41:17 -07:00			`// Print help message for the specified command.`
add (or restore) config.h to all files The autoconf-generated config.h contains a number of directives which may alter the behaviour of system headers on certain platforms. Always include it in every C++ file as the first include. Closes #2993. 2016-05-18 22:30:21 +00:00			`#include "config.h" // IWYU pragma: keep`

Run clang-format on all files The main change here is to reorder headers. 2019-10-13 15:50:48 -07:00			`#include "print_help.h"`

Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 02:24:38 +10:00			`#include <stdio.h>`
restyle proc module to match project style Reduces lint errors from 134 to 101 (-25%). Line count from 1994 to 1466 (-26%). Another step in resolving issue #2902. 2016-05-02 21:41:17 -07:00			`#include <stdlib.h>`
Run clang-format on all files The main change here is to reorder headers. 2019-10-13 15:50:48 -07:00
Switches over to cstring from string.h. 2019-03-12 15:07:07 -07:00			`#include <cstring>`
Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 02:24:38 +10:00
restyle proc module to match project style Reduces lint errors from 134 to 101 (-25%). Line count from 1994 to 1466 (-26%). Another step in resolving issue #2902. 2016-05-02 21:41:17 -07:00			`#include "common.h"`
Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 02:24:38 +10:00
Re-implement macro to constexpr transition Be more careful with sign extension issues stemming from the differences in how an untyped literal is promoted to an integer vs how a typed (and signed) `char` is promoted to an integer. 2022-09-19 17:42:25 -05:00			`constexpr int CMD_LEN = 1024;`
			`constexpr char HELP_ERR[] = "Could not show help message\n";`
Check return value of a few write calls and retry on EINTR, and fix a few other warnings, mostly by printing error messages before giving up. darcs-hash:20090222202852-ac50b-b0e79142af5b7a99e55271d4001fa252d9684a1d.gz 2009-02-23 06:28:52 +10:00
restyle proc module to match project style Reduces lint errors from 134 to 101 (-25%). Line count from 1994 to 1466 (-26%). Another step in resolving issue #2902. 2016-05-02 21:41:17 -07:00			`void print_help(const char *c, int fd) {`
			`char cmd[CMD_LEN];`
Apply new indentation, brace, and whitespace style 2012-11-18 16:30:30 -08:00			`int printed = snprintf(cmd, CMD_LEN, "fish -c '__fish_print_help %s >&%d'", c, fd);`
Remove trailing whitespaces and change tabs to spaces 2012-11-18 11:23:22 +01:00
lint: "collapsible if statements" warnings 2016-10-22 11:21:13 -07:00			`if (printed < CMD_LEN && system(cmd) == -1) {`
Re-implement macro to constexpr transition Be more careful with sign extension issues stemming from the differences in how an untyped literal is promoted to an integer vs how a typed (and signed) `char` is promoted to an integer. 2022-09-19 17:42:25 -05:00			`write_loop(2, HELP_ERR, const_strlen(HELP_ERR));`
Apply new indentation, brace, and whitespace style 2012-11-18 16:30:30 -08:00			`}`
Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 02:24:38 +10:00			`}`